I am a twenty year old woman who wears little girl underwear

I am a twenty three year old woman who wears little girl underwear. I mean literal little girl underwear from the kids section. I just like the designs and they fit me. I prefer the frozen themed ones with Elsa on them. Am I supposed to wear women’s underwear and not girl’s? No one will see them anyway unless my pants fall down. Which is something I don’t want happening.