I'm a bi male and this guy I'm seeing is 8-9 inches in length and at least 6" in circumference. When he fucks me in the ass and goes balls deep, especially when I'm on my back with my knees to my chest, he is hitting something up there and it hurts. I have this dildo with a 1.5 inch head on it that I can insert a lot deeper than he will ever go and it doesn't hurt. He tells me that I just need to relax more which I know is not the answer. I've seen videos, of other M/F taking really long cocks up their ass and they are enjoying it. I've also seen videos of males getting fucked and they are obviously in pain when the guy with a big cock goes deep.