People will believe anything if they want to avoid pregancy...

You can't get pregnant if it's your first time.

Jumping up and down immediately after intercourse will prevent conception.

Douching with Coca-Cola or 7-Up will kill whatever sperm the process doesn't wash away.

It's impossible to get pregnant if you have sex during your period.

After intercourse, a hot bath or a heating pad on the stomach prevents conception.

As long as neither party takes off their underpants, no babies will result.

Taking 20 Aspirin right after will halt conception from taking place.

Provided you do it standing up or with the girl on top, the sperm will never reach the egg.

As long as he pulls out before he ejaculates, no sperm will be loosed inside the girl.

Sneezing after sex prevents pregnancy.

You cannot get pregnant if you have sex in a chlorinated swimming pool.

...Or if they really want to get pregnant...

A woman can get pregnant only one day per cycle.

A woman should wait at least 3 months after stopping birth control pills before trying to conceive.

Orgasms cause women to release eggs.

Men should abstain until midcycle to increase the likelihood of conception.

A woman is more likely to become pregnant if the couple adopts a child.

The back seat of a '57 Chevy improves the odds of getting pregnant.

Coitus at the tops of tall buildings to increase gravity as you lie head-down increases your chance of becoming pregnant.