My mate and I live across the road from each other.

We both have an older sister and both like each others older sister.

My room is opposite my mates sisters and his is opposite mine.

Neither sisters draw the blinds when getting ready.

We both have a text saved in our phones to send to each other with a word that we know means they are getting changed and both watch each others sisters get changed.

His sister is lovely and she takes ages choosing her underwear haha