It appears that spammers are using sex to enlist human brain power to foil Captchas.

This is a Captcha:

Basically, the spammers have, “created a Windows game which shows a woman in a state of undress when people correctly type in text shown in an accompanying image”.

The Captcha comes from a site that uses them to prevent spam, Yahoo comes to mind as a prominent example.

This is brilliant. Evil, but brilliant. If only this man could use his powers of technology and psychology for good, instead of evil.