Found a used thong in husbands drawer

I was in a desk drawer in our basement looking for information about our dog. I found that folder. Near the folder was an envelope that was not sealed. The envelope was from a freelance anime sticker brand. I looked them up online and they had nothing to do with used underwear. Inside the envelope was a snack sized ziplock bag with a laced item in it. I was curious. I took it out and it is a lace thong with dried discharge on it. Size small. I am a size XL in underwear. It is not mine, and I’ve never heard of the brand. Nue Garage brand lace thong. It also had the smell of perfume.

Also in the drawer is a women’s metal butt plug with a red jewel heart on it.

What is all this. This is so creepy and so out of character. I never imagined him having this creepy side. I am panicking.

I want to know why he would have this. What are the places he could’ve gotten this?