Why does it hurt to have sex?

it hurts me to have sex in certain positions always in the right side, inside me it hurts so bad. everywhere else its fine.
i was just wondering if its him or me that there is something wrong with???

That's very bizarre, you should have that looked at. That would be something inside you not functioning properly.

get it checked by a doctor

Was it your first time? If so thats why just breaking you in.

If not then get it checked out.