Getting pregnant from pre-cum would be a hell of a trick. Pre-cum's (generally considered to be) sperm-free. Sperm could be in pre-cum, but only after a recent ejaculation.

(What are you, cobalt, a doctor? Fuck off, cobalt. But.. I should be well paid and respected. Keep dreaming.)

Where was I?

OH! Interesting theory, but unfortunately science fiction. Science fact - dude can't pull out quick enough and shoots baby batter too close to sticky, still slightly gaping, vaginal opening and WHOOOMP - there it is.

Babies conceived in this way would be total losers. How do I know?

1. Line up ten people.
2. Look to your left.
3. Look to your right.

They're not all winners, are they?