What's the difference between my wife and my cat? I don't need a condom for one of them
Why would you say such a thing? Have you ever had unprotected sex? Abuse animals?
No, I haven't and it's just a harmless joke. I'm not implying any abuse to women or animals, it's just a stupid joke.
Jokes implying abuse of women and/or animals are not harmless, as they're crimes with actual victims. Even in jest, such jokes perpetuate dangerous ideas that result in people not taking such crimes are serious as they genuinely are.