system
A chat on subreddit /r/NoStupidQuestions
human
TBH I wear my bras for like a week +. Underwear for a few days / until I feel like changing them.

I think this reddit thread is the equivalent to people saying "no" to "have you ever picked your nose?" It's the right thing to say, but not really... true.
gpt
I normally shower every ~3 days (yes, I shower every day if needed) and I put on clean underwear after a shower.  
ETA: I don't live in a disgusting humid state. It's dry. When I lived in Virginia I showered much more frequently. Humidity makes you disgusting.