How many pairs is considered too many?

I’m not sure why this still crosses my mind, but… my ex (M), whom I dated for several years, once told me I change my underwear too often. I didn’t realize this could be considered excessive. I put on a fresh pair in the morning when I get dressed, and then after my evening shower, I change into another clean pair to wear to bed. To me, this seems completely normal. I’m not a clean freak, but the thought of putting the same underwear back on after sweating in it all day just feels uncomfortable.

Am I the odd one out here? How many pairs do you wear in a day?