You should...

You walk back into the bathroom, and you say “what?” To your sister Alison.

“You should try wearing a thong or a v-string.” Alison said.

“Um, no thanks, those are what girls wear.” You said.

“I know. It’s just that I can see your panty lines through your pants, and I can tell that you are wearing cheekies. By the way sis, cheekies are girls underwear too!” Alison said to you with a giggle.