What do you people think I should know? How bad is this going to absolutely hurt?

Different for everyone, as long as the man will stop if you say stop,
And of coursse both of you need to be mentally prepared to be parents, since even on birth control pills and condom, we even have experts here that ended up pregnant, no method is 100 percent

Well he's already a dad so yea lol.

You are only 15 how old is he. He's already a father, is he trying to be daddy again. If all you are concered about is the pain. You are not ready. There is a whole slew of social consequences ofearly sexual relations.

Ok, I'm not trying to be offensive, but you are too young to be messed up with a man that is so irresponsible that he already has a child. CHILDREN SHOULD NOT BE HAVING CHILDREN!

Sex is something that is a mature action with mature consequences, so unless you are willing to get a job at the age of 16 working 40hrs a week and going to school, and taking care of a baby, DON'T DO IT!!

Sorry to be so blunt, but someone has to, we are all worried about your future, NOT YOUR BF's sexual satisfaction. That's WHAT HIS HAND IS FOR!!

He's good with his tongue if that counts for anything. His son is 4, He's 22. I told him that I want no kids.

It'll hurt less than labor and delivery I'll tell you that!!

You can't choose not to have children unless you choose not to have sex... or have your tubes tied. Sorry, birth control is not 100% effective.

It can hurt a lot, or not at all. It depends on if you are ready for it, the shape and thickness and presence of your hymen, the size of the penis, how responsive he is to your requests...

Friends have said that it is quite painful, some people feel nothing like pain.

Again if what you are concerned about is pain you are not ready. Be careful not to make him daddy for the 2nd time.