I don't know what the fuck is wrong with me. Had sex with 4 girls over 5 times each and just can't finish. I can actually last for hours. I'm 18, eat healthy, lift/cardio 6x a week and I weigh 195, 6 feet tall, 8 percent body fat. Im seeing this one girl at least once a week and always end up having sex but I can't finish. It's getting frustrating. Haven't jerked off or watched porn in 5 weeks. None of my friends can relate. What should I do?