So, I've always been a skinny guy. I must have a double metabolism or something, because I usually eat plenty. I'm 5'11 and 130 pounds (about 1.8 meters I think, too lazy to do the kilogram conversion). I'm not as gaunt and bony as I was as a child (I used be able to feel my spine if I sucked my stomach in hard enough), I have a fair bit of muscle mass on my shoulders and stomach. My hips, however, stick out like duck bills. Whenever my girlfriend and I have sex, we have so stop every now and then to take a break cause the bones are gouging into her inner thighs, which she says can get quite sore. Now I know missionary and cowgirl aren't the only positions, so I'll just resort to something else if I have to, but is there any way in particular of dealing with this, perhaps some sort of cushioning I can put on my hips? I know I've been asking a lot of questions here, but you lot have been helpful and I'd appreciate whatever advice you guys can give.