Little Sperm Attempts to Escape Egg, Biologists Note Sperm's Manliness

http://discovermagazine.com/1992/jun/theaggressiveegg55

The Aggressive Egg. I have to say I was shocked. In high school the sophomore bio classes would have a sperm race- one girl would stand at the end of a hallway (our school even kind of looked like ovaries at the time) and the rest of the class would race to her.
According to this article, that's not quite how it goes.. Check it out, and prepare to have some reproductive preconceptions battled!