The problem with this article is that it's mostly about women's orgasms .
it's all about vaginal, penetration, clitoris ,G spot etc.
as if other parts of the body don't need stimulation during sex.
I'm a man and i have sensitive nipples and i'd like some of my women to pay attention to them .(but i don't necesserily think that all men are alike)
but the thing about all men wanting some back door stimulation during sex is completely false .i don't remember wanting something like that , in fact i remembered one of my friend telling me that is girlfriend try to do that to him and he ask her to stop because he didn't like it.
...and for a woman to claim that the **** area is packed with nerves! it's maybe true "biologically" but i don't think they are necesserily for sexual stimulation. unless that person is gay and learn to love and get stimulation from them during sex.
the truth is we're all a little bit different , like our DNA are ,our faces are different and so does the lines on the palm of our hands.
and it doesn't take an expert to known most of these things .
for example I remembered reading an article in "muscle and fitness magazines" decades ago where Arnold Schwarzenegger claim that during peeing it's best t to exercise the "muscle of the penis" by retaining the flow of urine and releasing it because it helps you to get a stronger arousal and makes you have more intense orgasm too.