PARIS: Don’t say anything to Madeline or Louise about this ….
RORY: But they’re your best friends.
PARIS: Theoretically, yes, but the second I mention a guy they’re gonna both start singing the theme from the Trojan Man commercial, and I just can’t take that, okay?
Trojan, a brand of condoms first manufactured in 1916. About 70% of condoms sold in the US are Trojan brand. Their commercials in the 1990s and 2000s had a rousing song with a chorus of, “Trojan Man, Trojan Man, Trojan Man”.
The Annotated Gilmore Girls 