Why are men pigs?

I’m pregnant, showing like I’m ready to give birth, and I get on the elevator to pick my step son up from his mothers apartment. This man gets on, seeing my pregnant belly and looking me up and down. Call me gorgeous, asks for my number. I said “I appreciate that but I’m married.” And started rubbing my stomach. He says “he doesn’t need to know. Let’s hang out right now. You busy?”

Just disrespectful in my opinion.