Sexual Fluidity: Personal sexual characteristics changing due to biopsychosocial circumstances.”

General society intentionally conceals sexual fluidity by forcing sex, gender, and orientation into rigid, and unnatural categories.

Check The Box!

Are you a man or a woman?

Check The Box!

Are you feminine or masculine?

Check The Box!

Are you homosexual or heterosexual?

Check The Box!

When removed from their constrictive “boxes,” scientific studies reveal sex, gender, and orientation are naturally fluid.

These studies ask people to identify their sexes, genders, and orientations on traditional two-category, binary scales (Figure 1) and then ask people to identify their sexes, genders, and…


Transgender, cisgender, agender, heterosexual, homosexual, bisexual, transsexual, asexual, pansexual, intersexual, transvestite, androgynous…


(Raising their voice) What-ever happened to boys being boys and girls being girls?!

Sad to say, there is no other subject about the human organism that us humans judge more harshly than the subject of sexuality. And most often, our judgments about sexuality are driven by ignorance.

Biological sex, gender, and sexual orientation are prime examples of what we ignorantly and harshly judge about the human organism.

There are ways to fight this judgment. And the way with the…

Nowadays, what do you think is the age at which the average American first has sexual intercourse?

Pat yourself on the back if you said about 17 years of age.

Most Americans underestimate the age in which others are having sexual intercourse for the first time. This tells us something about where most Americans are getting their information about sex — the mass media, social media, and friends — all of which depend upon sensationalism to either sell commercials and ads; or obtain likes and subscribers.

Think about it, in today’s, virtual-misinformation age, people’s norms about sexuality are less-likely rooted…

The Psychology of Learning: Making Your Students More “Successful”

So, you want your students to be more successful in your classroom?

As you may know, there is an entire research literature with a long and comprehensive history, completely devoted to student success (see References). This paper takes from this rich literature and focuses on the psychology of learning.

The psychology of learning supposes three basic ingredients in determining whether a student will or will not be successful within the classroom.

Three Ingredients of Student Success (Video)

(Click here for an introspective exercise about your classroom.)

These ingredients are the student’s…

About 90% of men and 65% of women have orgasms from sexual intercourse with their consenting partners. Not surprising, these percentages vary based on a variety of factors, including the type of intercourse people are engaging in. For example, it is common knowledge (at least it should be!), the probability of a person having an orgasm increases and decreases relative to the underside of the glans penis and the glans clitoris being stimulated during intercourse. What is surprising and not-so-common knowledge is 100% of men and 94% of women receiving anal intercourse with their consenting partners report having orgasms.


When outside the body and within blood, semen, vaginal fluid, rectal fluid, or breast milk, the human immunodeficiency virus (HIV), the virus that causes acquired immune deficiency syndrome (AIDS) has a relatively short and fragile existence, and can be easily eliminated with soap, bleach, peroxide, or some spermicides.

There is a significant caveat when it comes to spermicides eliminating in vitro HIV. Spermicides containing nonoxynol-9 (N9) do not eliminate HIV infection because N9 irritates, and even causes inflammation of the soft tissues in the mouth, and linings of the vagina and rectum. N9 may even increase the risk of HIV…

True or False: Petroleum jelly, Vaseline Intensive Care, baby oil, and Nivea are good lubricants to use with a condom or diaphragm.

This statement is FALSE because all the lubricants listed contain petroleum. Petroleum-based personal lubricants break-down condoms and diaphragms on a microscopic-level, making them porous, and allowing sperm, bacteria, or viruses to pass through them — negating their birth-control or safe-sex effectiveness.

Thus, I only recommend petroleum-based personal lubricants used with condoms or diaphragms for people who want to gain a child or an STI (sexually transmitted infection).

With this said, and knowing the anus has no natural capacity…

Human sexuality scientists say seemingly controversial things.

For example, one of the things they say is “about a quarter of US men have sexual experiences with another man at least once during their lifetimes.” Human sexuality scientists say this even though only about 8% of US men report having sex with another man and only about 5% of US men identify as being gay.

So, what gives with these percentages being different from one another? They should be equal. Or should they?

The percentage of men identifying as being gay widely varies from one culture to the next with culture…

Answer me this: By only looking at a person — and knowing nothing else about them, can you reliably determine if they are gay or not?

Image from source

You are probably thinking you can do this, and you are probably wrong in your thinking.

Do not worry, you are not alone in your probabilistically wrong thinking, as a bunch of scientific research studies think this is possible too. But these studies back-up their thinking with accuracy rates ranging between only 55% and 65%. And remember, random guessing about something that either is or is not, yields 50% accuracy rates.

Most studies measuring people’s ability to determine whether a person is gay or not by only looking at them (gaydar), fail to control for subject biases and do not…

Pregnancy is caused by conception, the coming together of one sperm and one ovum, whereas contraception is keeping sperm and ova apart.

If you want to get pregnant, then engage in as much consensual penile-vaginal intercourse as you can while being postpubescent and premenopausal.

If you do this, there is an 85% chance you will get pregnant within one year.

For the other 99.9996% of times you are engaged in penile-vaginal intercourse; that is, the times you do not want to get pregnant, you will want to know about contraceptives. …

Don Lucas

I am a Professor of Psychology at Northwest Vista College in San Antonio Texas. My research focus is human sexuality. I also host a YouTube channel, 5MIweekly.

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