Why is it sometimes girls like it rough/hard and then other times they say it hurts?

There are a lot of factors involved but if she says it hurts ask her what to do differently. You'll get to a solution a lot faster.

All girls are different. some are gonna like it rough and some are gonna like it when it's not rough. and sometimes the same girl can like it either way depending on their mood....ask 'em how they want it..... one thing to know though is if you don't get a girl turned on enough she could be dry and that can make even gentle sex hurt.

Not every girl's vagina is the same . Some girls may be too dry but that's probably just her or something she got . Some girls are already sex experienced so it doesn't hurt them as bad as it does others

Sometimes we get sore from doing it too much and need a break