If a guy is in a bar, say, in another country, and the hottest woman he's ever seen starts coming on to him, and he has no chance of ever getting caught, there's every chance he'll cheat on his partner. Throw in the booze - which lowers inhabitions - and you have the recipe for disaster. But if he does cheat, I dont think it means he loves his wife any less.
And the wife will get a nice bunch of flowers to help stem his guilt, so everyone's a winner.
It's not only inhibitions that goes down with booze, if there was a god he prolly create booze to stop guys from cheating