sending nudes

Okay so I met this guy online and we been talking for a while, so he sent me a pic and I sent him a few pics. Never did I have my face in it, or detailed background, I would be in front of something blank. Only thing was that I had my belly button pierced (common) he told me to put my face in it, I said no. So this is okay right? Because u can't tell it me. He sent me a vid of him messing with himself and wants me to send a video, I made sure it was zoomed and the background was black.