Tissues Under The Bed

So, from time to time I clean my stepsons rooms. They're both teens, 16 & 15, and I usually find crumbs and left over food. But today, as I was cleaning my oldest stepson's room, I found crusty tissues underneath his bed and hidden behind a pile of underwear. Now, I found these tissues before but ignored it, I just threw them out thinking it was just snot or something. But today, it hit me (I know, I should've known lol, I'm not the sharpest tool in the shed!) that he's definitely been jerking off and wiping his cum with those tissues. I couldn't help but crack up laughing about it - I found it adorable that he hid it.

When he came home, I didn't mention it to him. In a way, I wonder if he does that on purpose so I can find them, maybe? Or maybe he just forgot? But wouldn't someone be a bit more conscious of that? Especially knowing that I've found those tissues before and threw them out and I make it pretty obvious that I clean his room (vacuum, mop, fold and hang up his clothes.)

Idk what to think lol maybe I should think at all! Lol