So I don't know how possible this actually is if I'm going to be honest
But basically I think it would be interesting if characters could have different possibilities or variations of underwear, whether it was randomization or another way to change the characters that you play with.
So basically when characters undress and get down to the underwear layer there could be variation, again based on chance or what you chose, a few examples being lingere, plain, some basic color changes, maybe "matched" or "mismatched variations". and as I was writing this I realized that the variations could possibly also go for socks or shoes, though anything besides that is probably too much, even though this is probably also too much lol.