system
A chat on subreddit /r/NoStupidQuestions
human
Or less.

1. If I work out, it gets changed
2. If it's summer and it's hot, and I've been sweating outside, I take a shower and they get changed. 

Come on, guys, it's not that hard. Underwears are cheap, and it feels so good to be clean.
gpt
I completely agree... It feels so good to be clean and changing them isnt that hard..however undies are NOT cheap..Idk where you get your underwear, but they aren't.