Is it normal to masturbate to stranger online?

So this this one guy on Facebook always likes literally every picture and post of mines. We inbox each other everyday, you know good morning and how you doing. He is always requesting videochat and I tell him why. Hes all like I want you to see I want to see you. So I send him a video message yesterday saying what the hell you want to see me for. He said please answe the call, Im getting all work up.

My dumbass answer it and at first I thought his fingers were in the way but then my sister and friend pointed out to me that hes hacking off. I hang up quick. After that he text whats wrong and I'm like dude wtf? Ye acted like he didn't do nonthing wrong. He text ten minutes later saying hi. And I'm freaked the freaked out cause it been a whole day and he still calling and texting saying are you mad at me and just weird and creepy shit.

We never meet each other in real life and the thing is we been friends for a year on the book and it's nots like I wanted to see it nut you could have send a picture instead I would have respect you a little more. My uncle said he has deep sexual issues and that hes in love with him self. Is it normal and should I block him now? He really startingto creep me out.