Is it possible to have casual romantic relationships with a ton of sims? (Update need help)

Build a romance sim so you get the Alluring trait, build high level Charisma, get the Great Kisser and Beguiling perk traits. You could probably try complete Serial Romantic to get the Player reward trait, but that will more likely happen as a result of doing all this

EDIT: And player sims are whatever sexuality you want them to be, straight gay or bi.