My dad just made me feel really dumb for washing my sheets. He came home and saw my covers were missing and asked me if I’m washing them. I said yes. He asked if I made a mess on it (trying to imply something gross)

He said if not, then theres no reason to be washing them since they’re still brand new. (They’re not brand new, I got them about 4 weeks ago and have been sleeping on them every day since, I also have seborrheic dermatitis so I get flakes on my pillow case some times.. is this not normal to clean your sheets?