My Name is Sooty Mangabey

The Sooty Mangabey (Cercocebus atys), also called the White-collared Mangabey, is an Old World monkey of Guinea Bissau, Gabon, and Cameroon. It has social groups of anywhere from four to twelve individuals. It is believed that a strain of the simian immunodeficiency virus jumped from this species to humans to become the HIV-2 virus.

not rectum exactly but it's somewhere near the prostate glands. This explains guys derive sexual pleasures from pounding their penis (sorry to be so explicit but for discussion and knowledge) when jerking or having sexual intercourse. the penis shaft (batang pelir) acts as a transmitter of the pressure to the end of the batang , where the prostate is situated. the nerves inside the prostate gets stimulated and hence the pleasure.

this explains why gays can also get pleasure from anal sex because the pressure on the prostate nerve receptors are not coming from the penis shaft, but from another penis inside the rectum.   , btw anatomically the prostate is very near the rectum.

Have u all tried stimulating yourself by inserting a finger into your ass while you jerk off? that is your G spot you know. Maybe God created rectum for 2 purpose after all

or get your girlfriend or boyfriends to jilat your anus during sex?  . very nice you know.