Hey /r/asktrp

So I am currently facing an issue I never thought I would have at 19. I have multiple partners I am currently sleeping with and the sex is good but the problem is I cannot cum most of the time. For instance, brought back a new girl about three nights ago and the sex was great, I mean my suite mates heard her through 4 rooms away. Problem was I had to fake another orgasm. Same thing with the other girl I was sleeping with and again last night. How do I fix this red pill?