Of a certain age, I bet a LOT have.
Also, did you ever think, the guy is between marriages. Maybe the woman asked him for it.
Between work, family, and friends I’m exposed to males ranging from teenagers to older than me. I’d be surprised if ANY of them have taken or sent pictures of their junk. It’s just gross ... and if your sweetie asks for such a pic, the answer is “no”. And no, I don’t want my lady to send such pictures of herself, either.