When I got married I found out that my wifes dog slept in the bed with her. For the first 2.5 years he slept in between us, we had to buy a bigger bed. Hair, dirt and him licking himself was almost too much.
The joke was that we would have puppies not children, especially when we found out we were having twins.
Thankfully he has gotten too old to get on the bed any more, but now he pi$$es on the couch, and I refuse to buy another one.