Interest in anal intercourse has also come from research in human immunodeficiency virus (HIV) transmission. Several studies have quantified the increased danger of heterosexual transmission from 1 act of anal intercourse in comparison with a single act of vaginal intercourse (Boily et al., 2009; Leynaert, Downs, & de Vincenzi, https://knqrx.acidblog.net/53181929/fascination-about-when-man-stops-having-sex-with-wife