This post was written by Markham Heid and provided by our partners at Men's Health.
Turns out, there's a lot more to his member than meets the eye. Apart from it's pretty damn impressive ability to make other penis-toting little men (and women!), here are six other crazy things you probably didn't know penises could do.
While you probably think of a penis as a device designed to inject semen, it’s also engineered to remove the semen of competitors, suggests research from the State University of New York, Albany.
You know that ridge at the base of the penis head—the raised part just north of the shaft? While a guy is thrusting in and out of his partner, that ridge rakes away the semen of any foes who may have slid into home base ahead of you, the researchers say.
Penectomy is a procedure that involves removing part or all of the penis. (It can be necessary if a guy has penis cancer.) But like the headless horseman, the dipstick doesn’t die if you cut off its head. Men can still urinate, have sex, and ejaculate even if the head has been removed, finds a study from Brazil.
Men whose flaccid penises hang to the left—and that’s the majority of them—may be “left-brain dominant,” suggests research from the journal of Human Reproduction. Due to developmental hormones, left-brain dominance is also tied to right-handedness, a larger right foot than left, and other forms of body asymmetry, the study authors say. The left brain hemisphere plays a large role in speaking, logic, and mathematical computations. The right brain is big when it comes to spatial and visual information, and pulling context out of a person’s words and tone.
So if his dick dangles to the left, that could help explain why he's great at figuring out what tip to leave at a restaurant but crappy at guessing why you're pissed at him right now.
While boners and ejaculation are usually a package deal, men don’t actually have to be hard to expel semen, shows a study from California’s Oakland Medical Center. A man's pelvic muscles contract when he ejaculates, but those muscles aren't directly tied to the processes that make his penis erect. So while unusual, a man can squeeze some out even when he's flaccid, the study authors say.
That’s according to a study conducted years ago at the University of Indiana by the famous sex researcher Alfred Kinsey. While there’s not much new data backing up that finding, one 2014 study from Weill Cornell Medical College found the force with which a man ejaculates corresponds directly with how satisfied he feels about his orgasm.
An MRI study from France looked at the shape of genitals during sex. When partners are in the missionary position, the penis—including the portion of the shaft inside the vagina—basically forms a smile-shaped curve. Why? Because it's happy, of course! No...probably because that's the best way the get the semen up in there...but doctors are still confirming that little detail.