"It's tough to stay married. My wife kisses the dog on the lips, yet she won't drink from my glass"

In this quote, comic Rodney Dangerfield is highlighting the difficulties of marriage. He begins by mentioning that it is tough to preserve an effective marriage. This could be due to different reasons such as differences in characters, interaction concerns, or just the reality that 2 people are trying to build a life together. Dangerfield then goes on to share a humorous anecdote about his partner's habits. He points out that his other half reveals affection to their dog by kissing it on the lips, however she declines to drink from his glass. This could be seen as a funny way of highlighting the distinctions and peculiarities that exist in a marital relationship.