My giant chicken lover doesn't know I'm a man

I have a Saturday job advertising KFC in a giant chicken costume. During the last few weeks I've become close to a man named Zipper and he has asked me out on a date.

However I told him that my voice sounded low pitch because it was muffled through the suit, but actually I have a deep voice because I am a man. Zipper does not know this.

Should I come clean?