Is it compulsory to break the hymen to participate in intercourse ?

Don't think about it: The bleeding with first sex idea is overdone. It doesn't always happen. Bleeding means there were little tears. If a woman has a healthy vulva, vagina, and hymen; if she is very stretchy; if she is happy and relaxed, with lots of natural lubrication; if a guy enters at a good angle, at the right spot; if he moves with gentler motions until she is well-lubricated; there may not be any bleeding.