If I were a young man in college. If I planned on sowing some oats, I would have a contract and have the woman sign it before engaging in sex. It is just not worth the anxiety anymore. But I am a woman, so maybe it is!
Honest to God, there is an app now which at various phases of a sexual encounter, permit an amorous couple to stop and each give consent to the next agreed to act.
There is a commercial for it online and, as you might imagine, it appears just as awkward as you might imagine.