What cause bright red bleeding after sex?
Answers: If it was the first time, then you 'popped your cherry' or broke/tore the hyem. If it was not your first time, then you probably had it a bit rougher or he could have been bigger and it just was rough on you vaginal area..
if it was your first time. it was your hymen
if it wasnt your first time. he was probably too rough and tore your vaginal walls a little bit