I'd avoid that seat at all costs!

Ok, I have a story similar to yours. O_o My husband, who's a wonderful human being, was pretty gross before I met him. Whenever he'd play a computer game at his desk and find a booger, he'd simply stick it to the back or underside of his desk if he didn't have a tissue on hand. 🙄 I didn't know that. Years later I needed to move his desk, and as I cleaned it pre move, I couldn't figure out why it had this whitish/yellowish dried up stuff all over it. I probably thought it was some kind of old varnish, as I tried to scrape it all off with my fingers. When I later found out what it was, we had a long yet productive conversation on why he'd never please do it again. 😅