A childhood belief about reproduction

To this day, I have no idea where this particular belief of mine came from, except that it was a sudden theory that came to me when I was sitting in the playground in 3rd grade. There was a girl whose older sister had told her what sex was and the girl was so excited that she knew a "secret," so she refused to tell any of us what it was.

So, of course, I was mystified and I sat in the playground for twenty minutes, trying to figure it out. Somehow I came to this conclusion:

Sex was when a man and a woman went to a restuarant and had a tea party, just the two of them. The girl would giggle a lot and the guy had to smile for one hour straight and then, when things went well, they got to drink very delicious tea. And then, -poof-, they'd look under the table and there'd be a small child there.