Is there a relatively positive, gender-neutral term for “person who has a lot of sex and is not always the penetrative partner”? 

“Sl*t” feels like too strong a word and has a lot of negative connotations behind it, whereas “stud” generally refers to people with dicks and usually implies sexiness rather than actual amount of sex. 

“Hedonist” is a good word, but I feel like it implies more about someone’s lifestyle and morals than I necessarily want in this context. 

So, is there a word like that?