On some accounts, prostitution is just another form of casual sex and as such not particularly harmful in itself, if regulated properly. I claim that, although casual sex in general is not inher-ently harmful, prostitution in fact is. To show this, I defend an account of sex as joint action characteristically aimed at sexual enjoyment, here understood as a tangible experience of com-munity among partners, and argue that prostitution fails to achieve this good by incentivizing partners to mistreat each other. (...) To substantiate this claim, I explore ways in which prostitution fails on the virtues of temperance, respect, and sincerity. (shrink)