well recently ive been having sex with a girl who is suuuper tight.... and its been really hard to last inside of her, specially since i dont jack off the day before sometimes or even earlier that day... anyways, try going a couple strokes inside of a girl, pulling it out for a sec, squeezing your penis for a couple of seconds, then putting it back in. dont squeeze too hard or anything, just enough so that the squeeze is tighter than her pussy so when you put it back in it doesnt seem super tight anymore, and it takes away a little of the sensitivity. anyways, it helps me out, so i thought id share.