A childhood belief about reproduction

I used to believe that couples could produce babies by literally sleeping with each other, thanks to TV and later on, a little knowledge of sperm + egg = baby. With my child mentality then, that translated to being amazed at the perserverance of sperms being able to err.. propel themselves across from dad to mom without physical contact. Or they could perhaps crawl over the bedsheet to the egg located somewhere on mom. *sheepish grin*