Anything to do with the mouth when it comes to sexual activity. Licking, sucking, using saliva and tongue to pleasure someone’s genitals. Completely safe, not possible to get pregnant, but do be careful you aren’t hurting your partner.
Jim: I had the best oral sex last night. I hope the chick enjoyed it too
James: What a night you had, I’ve never had oral sex, I bet it feels good Jim: It feels amazing if she knows how to suck James: LMAO