It's definitely a more of a psychological thing for me sometimes. If I'm really turned on by a guy and we're fooling around or I'm sucking his dick first, I get so worked up mentally before its time to fuck that I'll cum hard the first time he sinks it all the way into me. I even busted once hands free on my knees sucking dick just cause the dude's cock was so fucking big and it was such a wild turn on to be working on someone with his kinda size!
