promiscuous
adjective disapproving uk/prəˈmɪs.kju.əs/ us/prəˈmɪs.kju.əs/
（人）滥交的，淫乱的
(of a person) having a lot of different sexual partners or sexual relationships, or (of sexual habits) involving a lot of different partners
I suppose I was quite promiscuous in my youth. 我想我年轻时生活很放荡。
It's a fallacy that gay men are more promiscuous than heterosexuals. 认为同性恋男子比异性恋男子的生活更加淫乱，这是一个很常见的谬论。