Why dos some guys send nudes or unsolicited d*ck pics when you have not asked and your trying to have a normal conversation?

I’ve noticed if I don’t reply instantly or for complete no reason, I could be five minutes into a chat, and they’ll start sending me nudes for no reason. Even if I say I don’t want to be sent stuff like that, they’ll send it anyway. I just find it very desperate and creepy. I have no suggestive photos at all yet I get this type of behaviour majority of the time. A guy just now asked for my number, then cause I didn’t reply within 3 minutes (literally 3 minutes) he sent me an “X” then another a minute later, then a video of him j*rking off a minute later. I blocked him. But why do they do it?

Why dos some guys send nudes or unsolicited d*ck pics when you have not asked and your trying to have a normal conversation?
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