Do sex make u cum??

a genuine question from this curious green-horn right here liiiiiike im pretty good at pleasuring myself and for someone as h*rny as me, I wanna try having sex (in the future, not rn haha) and while I was having a lil discussion with my h*rny alter ego.. I suddenly thought, "what if they can't pleasure me?". I mean orgasm feels nice as hell but it takes time right???? so what if they cum before you?? what do you think of while doing it? how to achieve tha perfect fake moan?
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im scared asking this ques haha