Why do I lose my erection right before s*x?

use a condom so you aren’t worried about getting her pregnant lots of kissing like the person said before make sure she is wet so it can just slip right in and then just keep on going if it is not all the way hard and it should harden all the way up again maybe she needs to take the initative to make you feel more comfortable take your time and it will happen when it is meant to be

Your both going to be nervous for the first time but try to relax more. Try not to speed anything up when your kissing. And make sure you dont have anything else on your mind, for example are you worried about anything else other then keeping your erection. If your still having proplems then maybe you should talk to someone more professional, you dont have anything wrong with you, i think your not relaxing enough and thinking ahead of yourself Good Luck

get her to put the condom on while kissing so it feels like a hand job. maybe its your body telling you your not ready yet, im sure the time will be right and its differnt forr everyoone. when putting on a condom it can kill the moment a bit so maybe try kissing while she puts it on and you finger her or something :) hope it helps xx