I can make a guitar sing - Talking people into the worst ideas and then acting like it'

Talking people into the worst ideas and then acting like it's their fault.

I convinced my friend to eat a whole pie. Now he's sick and I'm laughing at him.

She said I could paint her house. I believed her. Now her house is pink and I'm out $50.

He told me I could win the lottery. I believed him. Now I'm out $20 and I still have no money.