[NSFW] Unable to reach orgasm without jerking off furiously

Hey there guys. I don't know if it's the right sub for this, if not I'm sorry. So I've been experiencing this problem since like forever. I didn't really bother me before but lately, since I've been having sex here and there it's starting to bother me. I don't mind if I'm just jerking off by myself but when I'm having sex with another guy, it's kinda awkward that he's unable to make me cum. Usually when I wank I just watch some porn and want to be done A.S.A.P so I go fast and hard. But when I'm with a guy, I'm having a lot of trouble staying hard if I'm jerking off like if I was watching porn. I was able to reach orgasm ONCE without jerking off ans it was when he was fucking me really hard and fast. So I've been wondering if there was something I could do to be more easy to cum.