ive only been able to make a girl cum with the first 1 minute like 5 out of 50 times
but i have the similiar problem. i usually jizzle within 5 mintues, but i found a helpful tip
keep switching positions until you find one that you cant feel too much of. like if shes on her back, youll blow faster, if shes on top, you can last quite a bit longer.... and if its doggy style... lets just hope you can get it in there before you blow