When I was in Israel a sweet middle aged woman who lived nearby came to the dira and asked how she can wash her husbands tzitzis without ruining the strings.
Everyone else admitted that they never wash their tzitzis but I showed her how to wrap the strings in aluminum foil and put the beged in a mesh bag and how to hang it up to dry as opposed to using a dryer.
I offered to lend her the mesh bag but she admitted that it was just a test to see who was good enough for her niece.
“Would you like to go out with her?”
“Sorry, I would love to have you as an aunt, but I’m only 19.”