I was in kindergarten, I think. Unless you have to be five before you start. Then I was in 4 year old pre-school class where I got my first kiss at recess.
Meredith came over after school to be babysat and I tried my darndest to impress her with swing set tricks, the fact I could ride my bike with no training wheels (dad, the loveable guy he was, would set me up at the top of the driveway and push. I learned early and quickly to avoid concrete and high rates of speed) and how high I could climb the backyard tree, none of which she cared about to my surprise and wounded pride.
I got her to play "wedding" knowing there would be a kiss at the end and it worked like a charm. She was kinda boring after that though, wanted to play dolls and stuff. I assume that's what she did most afternoons while I rode my bike around the cul-de-sac and climbed trees.