Subliminal messaging

Sylvia's very big on subliminal messaging.
S: Can I have cookie please?
M: Not now, we just finished dinner and dessert.
*I start reading my book for a few minutes. Sylvia sneaks up behind me*
S: Coooooookies........Cookies for Sylvia (right in my ear)
She tries with anything really. I guess she figures she can plant the suggestion in my puny brain without me realizing.