Nail Bait
A guy uses another guy as a fancy trap to get a girl. The second guy might be a total stranger or just someone the girl knows a little. He's just there to make the girl lose her mind.
That guy used his dad to get my friend's girlfriend. His dad looked confused the whole time.
My friend used his classmate as a trap to get the girl from school. She didn't even know he was in on it.
My cousin used his brother to get my sister's friend. The brother looked like he wanted to die.