Wet - Cartoon Panties

TV Tropes describes this as a comedy device where a character's underwear—often featuring goofy prints—is accidentally exposed for embarrassment.

Constant moisture can lead to yeast infections, irritation, or bacterial overgrowth, according to Summer's Eve . wet cartoon panties

In many health-focused articles, "wet panties" refers to moisture caused by natural biological processes. TV Tropes describes this as a comedy device