Friends Husband Wears Panties

My friends husband wears panties and I have seen him in panties a few times although he does not know I have seen him in panties. I have stayed over on the couch a few times while out with my friend his wife, and have seen him late at night walking down the hall back to the bedroom only in panties. I have had so many fantasies about what they are doing together while he is wearing panties. My friend has never mentioned that her husband wears panties, so I don't think either one of them knows I know he wears panties.