You shouldn't drink too much around your partner.
Brad is at a bar with his girlfriend and a bunch of their friends.
Brad wants to drink beer.
Brad has two beers and is generally well behaved at the bar.
Brad drinks nine beers at the bar and completely loses control of himself as a result.
Brad's girlfriend is happy that Brad doesn't drink excessively and has a good time with him.
Brad's girlfriend is humiliated by his drunken behavior and starts questioning the relationship.