I haven’t done a GSS analysis in a while, and since Sister Y assumed I had, that provides the angle. The initial post was about Gordon Gallup’s theory for the evolution of homophobia, but Sister Y thought I had shown surprisingly higher numbers of children among men who report male sexual partners. I linked to the Inductivist over there, but I’ll see if I can replicate his results with the GSS.

Mean number of children by gender and sexual partners EXCLUSIVELY MALE BOTH MALE AND FEMALE EXCLUSIVELY FEMALE
MALE .83 1.11 1.73
FEMALE 1.90 .96 1.20

Gallup theorizes that parents who kept their children away from gays were more likely to avoid having their children become gay and thus have more grandchildren. Wilkinson complains that no evidence was provided for that being the case (only that people behave as if it were), which leaves open the possibility that the behavior, while evolved (heritability should be examined), is adaptation-executing rather than fitness-maximizing. It’s not a pure physiological reflex, but something that requires some higher brain functioning (at least enough to respond to hypotheticals given by the experimenter). An idea as simple as desire that one’s children associate with role-models desirable of emulation could be at work even if in some particular case the child’s behavior is unaffected. On the other hand, if Cochran’s theory is right then orientation may be literally contagious at certain stages of development.

On an unrelated note: Frances Wooley finds an anti-feminist subtext in “dumb men” ads.
UPDATE:
George Weinberg was surprised that some of the “exlusives” managed to have children at all. So I should clarify that the above was based on partners in the previous year. There is another question for the past five years.

Mean number of children by gender and sexual partners EXCLUSIVELY MALE BOTH MALE AND FEMALE EXCLUSIVELY FEMALE
MALE .76 1.08 1.72
FEMALE 1.90 1.12 1.22