Men often love anal sex because the anus is tighter and more constricting than a vagina, creating intense friction and pressure around the penis that many find uniquely stimulating. The tightness comes from the sphincter muscle, which can grip and pulse in a way that feels different from vaginal intercourse. There’s also a strong psychological charge: the act carries a sense of taboo, dominance, or transgression that heightens arousal for some men. Visually and physically it can feel more primal or possessive. The physical intensity and the mental thrill explain why many men seek it out.