Is my kid weird?

On Saturday while we were out for a walk, W., who is four, kept pulling up his AC/DC t-shirt and flashing his belly. Sometimes he would say "Oh, there's a baby in there!" and sometimes he would just show his lovely, slightly rounded, pleasantly smooth, lily-white belly. Who wouldn't want to see a fine belly like that? But then, then he topped himself, doing something I will never forget. While walking past the Mondpalast, a hostel with a bar that has tables outside on the sidewalk as well, he saw a round table surrounded by several chic, made-up young ladies. What did he do? Oh yeah, he flashed that belly. But not only that. He stopped very close to them and their waiter who happened to be by the table at that moment, too, and started snorting like a little bull getting ready to charge. Then he took a couple of steps and repeated the process. All parties involved cracked up.