Friends husband is sketchy.

So when I was 18 I was friends with this guy who was my ex's friend. Then he got a girlfriend and I became friends with his girlfriend. Now they are married now and live in another state. I haven't talked to either of them in years. Now out of no where the husband messaged me on Facebook making casual chit chat and then asking for my snapchat and saying we should skype. I said "I'd love to catch up with your wife too! Tell her I said hey! ". So he adds me on snapchat after saying he had to go to "bed" and then starts messaging me on snapchat about his tattoos asking to see mine. I have one on my upper ribs and i sent him a close up of it (no side boob or anything! ) and he's like that's all I'm gonna see? And then keeps sending me pics of "his tattoos" with his shirt off. And at one point sent me one of him in the dark with what looked like no pants or anything on. So I was like the fuck?