Because glue “bonds”…wow, that’s a real reach even by Boy Lisa standards. This could be one of the worst FW gags I’ve ever seen and I’ve seen plenty, believe you me. “Bonding…together…hmmm, what sticks things together? Welds? Rivets? No, that’s no good…heyyyy, I think I’ve got it! GLUE! Yes! Now what could Boy Boy Lisa have glued together…let me take a look around the room…a COUCH! Eureka!”. I mean yikes, that’s a totally alien thought process to me. Then again, I’m not medically or contractually obliged to end every interaction with wry wordplay, so perhaps I’m just naive or something.