For many years I and a couple of buddies would trade our wives and daughters' dirty panties, and then stroke and cum in them together....and suck a good load of cum from a bud's cock through the crotch of the dirty panties. Good times!
Me and my cousin used to do this all the time we would use the same pair of panties over and over again till there was so many cum stains on them they were hard to use anymore plus they smell really great with all the cum stains on them