Are these real questions? I'll answer them, but if you're trolling me, I'll cry and tell my parents, then you'll be in trouble but good.
Why would someone lie about having sex? It's not going to help them have sex, and it's going to raise expectations for them to live up to. I think most people would be honest about it.
Men don't bleed unless there is something very wrong. There is a condition (the name escapes me) where the foreskin is stuck to the penis, and when they have sex it can force it free and there can be some bleeding, but that person would have to be stupid enough to try and have sex in that condition.
A man is no more likely to bleed having sex with a vagina than a anus. Sure it's tighter, but it still shouldn't cause any bleeding. If you mean the man's ass. I have no idea, but shitting doesn't make bums bleed, I don't think a dick should.