Looking for advice as to how to move forward at this point.
I have two kids, a daughter Katie(21) and a son Scott (16), and this story involves Scott doing something I never expected. As a single parent I've tried to be open and honest with both children concerning sex, and their bodies, however I was not prepared to see my son in this way. Katie goes to college in Arizona, so for the most part it's just Scott and I at home, kind of guys being guys. Scott masturbates on a regular basis, which I am perfectly fine with, bearing in mind that he keeps his door shut. A little over a year ago he expressed interest in getting a subscription to a magazine like Playboy, or Penthouse, and preferring that to him messing around online, I obliged.
This past week was Thanksgiving, and as such he had Wednesday through Friday off from school. I had to work on Wednesday, but was able to get away a couple hours early. Upon arriving at home, the stereo was blaring as usual, but Scott wasn't in the family room where I thought he'd be. Going upstairs to change clothes I figured if his door was closed, he was probably busy, but it was open and the room was empty. Coming around the corner, my daughter's room was open, which was odd because we keep it closed while she's at school. I peaked around the corner to see in, and Scott was there playing with himself, wearing nothing but a pair of Katie's panties. I was shocked but didn't say anything, glancing again to see if my eyes were playing tricks on me, but he was there with a pink pair on rubbing himself.
As a parent it was strange to see my child in that situation, not just the wearing panties, but masturbating. At this point in time, I'm not really worried as to whether or not he's gay because of his interest in girls. But I'm not sure how to handle the situation, if he wants to wear panties when he masturbates, that's fine some guys do, but they're his sisters, and that's wrong and an invasion of her privacy. I've thought about talking about it, or maybe just going out and buying some for him, but its not like with the magazine, when he asked for it. Scott doesn't know I know. Like I said, I'm just looking for advice as to how to move forward.