How do I explain to my roommate that the electric pepper grinder is basically a dildo?

So my roommate (let’s call him Josh) walked in on me in the kitchen at like 2:30 AM. I was experimenting with the electric pepper grinder. And by “experimenting,” I mean I was inserting it (clean, mind you) into my anus.

Now, Josh completely freaked out. He just stood there, mouth agape, like he caught me strangling a raccoon or something. Didn’t say anything, just made this weird “ughghh” noise and backed out of the room.

He’s been avoiding me since then. When I tried to talk to him the next morning, he just mumbled something about "not being able to look at the spice rack the same way again" and left.

Here's the thing: the pepper grinder is basically a vibrator. It’s smooth, cylindrical, battery-powered, and makes a pleasant hum. Like, if it weren’t labeled “pepper grinder,” it’d be a very fancy novelty toy on some questionable Etsy page.

Also - and this is important - I cleaned it afterward. With antibacterial soap. Twice. I'm not a monster.

I get that he’s shocked, but I feel like he's being weirdly judgmental. He doesn’t own the pepper grinder. I bought it. I use it. I ALWAYS clean it when I'm done. If I want to use it for non-culinary purposes when no one’s around, isn’t that my business? How do I explain to this guy he's wrong?