[KDCat]

Twenty + years ago, my sisters exchanged lavaliers with their boyfriends. He wore her letters on a chain and she wore his. A gay couple could do the same. If the sig other is in another fraternity, they could wear engraved letters, with the boyfriend's letters below his own letters. There are a number of places that sell engraved dogtags with fraternity letters.

Women who are pinned usually wear their boyrfriends' below their own pin. Same principle.

That said: After breaking up with my boyfriend from freshman and sophomore year, I didn't truck with lavaliers or wearing letters much. He was crazy jealous and the "wearing letters" thing was too much like wearing a "no trespassing" sign or a dog tag. It was a sign of ownership. Bleh.