..Don't even consider giving him some.
If he's so pushy about wanting to see you naked, then I don't find him as a very good boyfriend, unless you tell him No and he stops. If he's willing to wait, then hes good in my eyes.
I see that if a guy wants nudes, he's either testing you(To see if you really will.), really desperate, planning on masturbating OR sharing them online/ with pals. Which would make him an asshole.
Testing you : To see if you easily give in. If thats the case, don't do it. Because if you don't, then he'll most likely respect you more... girls that share nudes come off as whores and easy.
Really Desperate : He just wants to see you naked. Still don't take chances.
Planning on Masturbating : Porno exists.
Sharing Them: This is the main reason why you shouldn't. This could get you both into legal trouble, or cause you a lot of pain and humiliation.
I have no idea of knowing his motives, but generally, those are the main reasons why.
So bottom line is : Don't share them no matter what :P
Wise advice from people I know