Here I come again 1 year after with another question.
I was having sex with this guy, put a condom on him (was a bit too tight and dry) and he tried to push it inside me. As soon as the tip got in (about 1-2cm) we heard a noise that was the condom breaking. We immediately stopped the penetration and removed the condom, and no more penetration has happened. Apparently the condom didn't rip on the tip, but a bit on the side still on the "head" area.
So I think the actual time that there was some penetration was less than 2 seconds, because as soon as the penis slid past the anus muscle, the condom made the noise (must have been an air bubble or something) and we stopped. And the penetration wasn't very deep too, not even sure if there was an actual contact between penis and anal skin.
Is it PEP worthy? He says his exams are quite recent, even though I don't much about him. Thanks