I really don't understand why guys get on cam and jack off. So I'm sure some of you Redditors do this and my question is why? (NSWF?)

Most of the time there is nothing leading up to some guy whipping out his dong and jacking off, so what is it that makes you feel the need that the other person(s) need to watch you?

Does being watched get you off?

Are you hoping the girl or whoever will spontaneously rip their clothes off and join you?

Or are you just wondering what you look like on cam?

I'm honestly curious about the mindset and reasoning behind doing it.