A bonding agent.
Glue a sandwich on the ceiling.
That's my story and I'm sticking to it.
A beautiful dress can make one girl look gorgeous... A bottle of whiskey can make all girls look gorgeous.
Anyone can tuna piano, but nobody can piano a tuna!
Chemistry, because he knows a lot about bonds!
They both form a bond in seconds, last (ideally) forever, and are dissolved by alcohol.