RaeC,

Just wash off the stains. It can be worn again. Guys are just curious on the thongs and g strings because still not many girls wearing g strings and thongs in M'sia. Guys don't see it very often.

I strongly urge the guys not to steal gals' underwear. If you like the girl, it is better to know her and go after her if she is single. If  both of you get together, you'll get to see her underwear very often until you don't even want to steal. I sympathize the guys who steal underwear because they do not know how to go after the gal.

For gals, please don't freak out if you found out that your bf masturbates with your underwear or wears your underwear because most guys now are metropolitan guys. Metropolitan guys wear their gfs' underwear. Example, David Beckham wears his wife's underwear, he admitted it to the press.

If she is married, then go search elsewhere.