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.
We are often troubled, but not crushed;
sometimes in doubt, but never in despair;
there are many enemies, but we are never without a friend;
and though badly hurt at times, we are not destroyed.
- Paul, II Cor 4:8-9