probably depends on the eyes. I had one boyfriend who could persuade me to do just about anything if he push his glasses down, looked up at me, and pushed out his bottom lip. if any of my other boyfriend tried that I would've started laughing hysterically.
Puppy eyes get me every time. The trick is that the girl actually has to have a tender and gentle side. She must be a sweety with her friends, family and me. If a mean girl tries that with me I'm gonna give her a hard time for it.