yep - i have "special occasion" underwear too. these i wear only to bed - and usually for extra action:
there are a couple of pairs of silk boxers - one for Christmas - i know - very corny! and a pair of elegant paisley ones. they feel great.
and i have a pair of Marvel super-hero trunks and a pair of Teenage Mutant Ninja Turtle ones that have pictures of the 4 of them and the word "AWESOME!" all over.
a couple of years ago i wouldn't have had the guts to wear any of them. in fact when i started here i confessed to an underwear fetish that was very triggering for flashbacks - but with the help of my T was able to turn that around so that it is now a positive turn-on with my wife's participation!
i keep the ordinary cotton boxers for sleeping in.
"the scariest thing about abuse of any shape or form, is, in my opinion, not the abuse itself, but that if it continues it can begin to feel commonplace and eventually acceptable."
- Alan Cumming, "Not My Father's Son"