sex orgasms

hey, so one of my goals and the main reason im doing the nofap challenge is to be able to reach orgasm during sex. when i have sex i can go for hours but im never able to climax and the couple times i did a few years ago it took hours.
i decided to give up P and M to help me achieve that goal but do i really need to stop M in order to reach that? what if i did it only occasionally like once a week or so and tried to go slow so my body wouldnt get use to it going fast? i know most people will say its best to cut both but i want to know if anyone has given up just P and is able to reach orgasm during sex regularly and within a decent amount of time (and yes i know everyone is different im just curious).