Something like this: http://crazy-grandmother.com/inxy/m/000/000/698/m2044xff32e08.jpg
The greater the contrast between the woman's older age and the outfit younger "age", the better. (I guess the fetish is mature women approving of, or somewhat backing, the sexual desire for young girls).
Naughty milf in a schoolgirl uniform gets humped doggy style, then she lets her hot stud of a man cum on her back.
Divine Danica Collins as a naughty mature schoolgirl