Sapphic polyrule

An old joke

Question: What does a lesbian bring on a second date?

Answer: A U-Haul.

It is considered a staple of lesbian humor.[5] It is often attributed to comic Lea DeLaria,[6][7] who claimed in her 1997 comedy album, Box Lunch, that she had written it in 1989 — in the album, she gets the audience to yell back the punchline, showing it was already well-known at the time of recording.[8]

As there are numerous U-Hauls involved here, clearly it's a polycule

Polygamous lesbians moving in together. The joke is that lesbians move in quickly, it's a common meme.