As Mother's Day approaches, when most of us spring for eggs Benedict and a tulip bouquet, another segment of the population will be honoring moms in its own uniquely Freudian way: by watching MILF porn, the adult industry's hot new genre.

"I'm 41, and I have these 25-year-old fans writing me letters," says actress Demi Delia (MILFs Night Out, Lowfat MILF). "They must have mommy issues." A lot of people do, apparently. According to Sugar DVD, a Netflix-style service for porn, MILF — a now-common acronym for "mom I'd like to fuck" — is its second-most popular genre (after interracial), up from 14th place last year. The company's most popular title, It's a Mommy Thing 4, recently overtook five-week champion It's a Mommy Thing 3. Meanwhile, on the Web, YouPorn.com (a YouTube knockoff with millions of visitors each day) reports that MILF, mature, and wife are three of its top 10 search terms. "The plot's always the same," says Delia. "My sons' friends come over and I sleep with them." How old one has to be to qualify as a MILF is up for debate (and fans do, hotly, online), but the industry standard seems to put the minimum age at 30.

To director Axel Braun (Cookies & MILF 2 and Hustler's best-selling MILF Trainer series), the MILF moment reflects mainstream Hollywood, where many actresses of a certain age are playing seductresses — on camera and off. "Start with Demi Moore. She's hotter than she looked at 25. Sex and the City — the girls are not young, but they make 40 look hot and glamorous," Braun observes, adding that "teenagers dressed as sluts" hit oversaturation right around the time of the Paris Hilton sex tape. "There's just not much fantasy there. Instead, we're playing into the idea that a more mature woman knows what to do in bed." Having just wrapped This Ain't Happy Days XXX, Braun adds, "Mrs. C., played by Raquel Devine, is the ultimate MILF. And in our film, she finally gets nailed by The Fonz."

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