Straight monkey is going to get more action, but as long as lesbian monkey gets at least some hetero monkey love, her genes are going to be passed on and crop up from time to time, resulting in future lesbian monkeys.
Somebody who knows more about this sort of thing than I can correct me if I'm wrong, but AFAIK animals aren't really interested in members of the opposite sex as such, but by the pheromones, mating display, etc. A male dog gets the hots for a female not because she's female, but because she's emitting the right signals during the period she's in heat.
--- Charles Brown <charlesb at cncl.ci.detroit.mi.us>
wrote:
> CB:
> One has a specifically
> heterosexual urge,
> built in biologically, in her genes. The other has a
> generalized sexual
> urge like you explain, also in her genes. She just
> wants to have sex ,
> hetero, homo, or just with another creature or
> masturbate. Seems to me
> that the first female is much more likely to get
> pregnant. The other
> non-heterosexual activities would distract the one
> from the critical -
> from a selection standpoint - type of sex. There
> will be differential
> fertility between them, and the one with the
> specifically heterosexual
> urge will be selected for.
>