Heterosexual anal sex: Part of an expanding sexual repertoire? This is because not every person was asked or required to answer every question.
All models are 18 years of age or older.
Sexual risk among injection drug users recruited from syringe exchange programs in California.
A gender discrepancy analysis of heterosexual sexual behaviors in two university samples.
It got to be where he started doing this on a regular basis.
Penis-in-vagina cowgirl gives you the reins, and the same goes for the anal sex version of this woman-on-top position.