So I have had sex with one of my very close friends three times now and every time I have an akward pain in my lower stomach pelvic area. It hurts so bad I have had to tell him to stop a couple times. He isn't the biggest guy I've been with but he is the only one that I have ever had this happen with. Any ideas why this is happening? (Ps his penis also has a slight curve upward but not sure if that would make any difference)