Damn, dem fat chicks is gettin' some: I looked at GSS data to see which single people have the most sex partners in a year: skinny or fat ones. Here's the mean (it's an index, so it's not quite the same as the mean number of partners):
Mean sex partners score
Males, N = 936
Below average weight 1.44
Above average 1.44
Considerably above average 1.11
Females, N = 1,099
Below average weight 1.38
Above average 1.09
Considerably above average 1.50
Average guys do the best, while the really fat ones come in last. Seems about right.
But the chicks. When I say big sluts, I mean big as much as I mean sluts.