In my school days, "Stud" was a term affixed to guys with active sex lives, "Slut" to women. Many are reclaiming the term slut, rejecting the sexism inherent in its prior uses. For example, consider the popular 2009 book "The Ethical Slut", on the subject of polyamory. I had an acquaintance who, upon being left by her long-term partner, enjoyed sexual exploration--group scenes, domination, submission, body type differences--before eventually returning to monogamy. That book emphasizes honesty and transparency as the cornerstone or ethical exploration of one's sexuality.