Me and my gf have been together for over a year now but only started having sex a few months ago, is was still a virgin but she had some prior experiences. Before i just fingered her but my arm would give out before she could come which was weird to me because i do work out occasionaly and with prior experiences it was quite easy to make a girl come. Even after hours of eating her out it just wouldnt happen, is looked at tutorials online but it only helped a bit but not to make her cross the finish line. A few months ago we started having sex because i tougth that migth be the way to do it because every girl is different so i have to try more ways. My penis is not small arround 7 inches but sometimes she says she cant feel anything other times she says she enjoys it, i like it but i feel very selfish to be the only one who cums because it is done between 2 people and theh should both enzo it, does anyone have tips for me.