Why would you think that's a normal question? We don't refer to people being in "in heat". And he's dead anyway. Even if you didn't know Heat was a movie wouldn't you figure out from context it's more likely asking about a movie or show?
Well, despite having read all of the comments, it took me reading yours to finally understand the joke. I thought the joke was just googling if random people were in heat to fuck with ai. Never heard of the movie