Why are guys more open than girls, and why do they constantly ask for nudes?

Anonymous
OKay so like this one guy is 16 and at some point he would always ask me for nudes, i always said no until i just gave in one day and sent them, every single day after that, like no joke, he'd ask, like wouldn't that get boring? and i felt like i had to send them, so i did. Then this one time on his social media he posted a video of him and his friend playing video games or whatever then like a minute later asked me for a nude, i said no because i knew somebody else was there, anyways he said there wasn't a sent a dick pic to prove it, but im like 99% sure there was. Anyway I've noticed that with a lot of boys they can just whip their dicks out in front of their friends etc, and they just dont care, like why is that? And also this guy lives in a different part of the country to me but every single guy i talk to will eventually ask for nudes, even if im not flirting what so ever, its just so annoying like why? woudn't they want to physically do something rather than look at a screen. I've only sent nudes to that one guy but everyone else is so annoying.
Why are guys more open than girls, and why do they constantly ask for nudes?
10 Opinion