Just 'tween us girls, how are your laundry habits? I think I was a typical teenage male; my stash was either well-hidden or on my body. I had five sibs so when the house was empty I never thought "Cool! I can finally do laundry!". I guess I was a stereotypical college male, too, not worrying too much about how clean my underwear was from day to day, unless I had a date. I'm embarrassed to say that my habits didn't change very quickly. For as long as I remained closeted in my own home, I did girly laundry yearly at best.
Flash forward to my fifties, post-divorce... I rinse out a few things a couple of times a week, and I hand-wash most of my clothes because it keeps them soft. I find I like the smell of Woolite. Unlike Richard Dreyfus, I very much do "like the panties drying on the rod".