Why is everyone calling Meishuu a slut?

B/c ppl have this strange notion that once someone bottoms (even if it's only for one person), they have to conform to some kind of chastity thing women have been held to for millenia. Frankly, it's stupid, archaic, and demeaning.

Bc he's flirting around even when he's supposed to be in a relationship with Ei. I'd still call him a fucking slut if he was the seme tho.