Do cats instinctively know where your bladder is?

They just know. It's part of the are of being a cat.

Our cat knows exactly where to jump on the stomach so it'll hurt us the most. He often gets my boyfriend's bladder in one go, with me it's the gut. Talent, it's pure talent.

I think you might be on to something there! Whenever they come to what I call needing (like dough) they always want to go straight for the bladder area!

Bless your heart! Hehehe, sorry! I know how you feel. When winter time comes, my cat likes to jump on the bed with my parents or my brother or me and spend the night in the house. He is sooooooooo cute when he does that, although, he does climb onto my private part, athough he doesn't know any better. I just think it's cute because I can hear him purring. Sometimes, I think it's funny!