In the US, at least, consenting adults are free to do what they like within reasonable limits, of course with a concession for obscenity while in public. There's nothing particularly obscene about doing a body shot in good company. Had it occurred to you that some might find it fun?

Two things about your "culture": 1. Why does your culture seek to prescribe sexuality in such a seemingly overbearing way? 2. Has your culture not yet moved beyond slut-shaming, which is irrational and harmful for all parties involved?

From what sort of fucked up society do you come from?!