This Guy Took Notes in Research Methods Class

But hopefully not from me.

From CNN.com:

LONDON, England (AP) -- The underwear-obsessed telephone stalker's undoing proved to be the opening of a gym opposite the apartment that the 40-year-old shared with his mother.

Detectives caught Paul Kavanagh on film, leaning over the balcony of the West London apartment, just as he was peppering the gym's female receptionists with calls.

Jailed for 2-1/2 years Friday, Kavanagh admitted making some 15,000 such harassing calls to women, asking them questions about their underwear. He posed as a clothing researcher and claimed to be gathering marketing data for a retailer.

He had been making the calls for 12 years, usually starting off his conversations with seemingly innocuous questions about the women's socks and cardigans. Then he would move on to their underwear, making lewd suggestions to his victims.