Wednesday, June 18, 2008
Sexual Preference and Brain Makeup
There's an interesting piece from Time about physical differences between the heterosexual and homosexual brain. It seems that those after women-- heterosexual males and homosexual women-- had brains that were mildly asymmetrical. Those after men-- homosexual males and heterosexual females-- had brains that were more symmetrical. The impact here, though the biology types here may have something more of substance to say, is that it's not just regions of the brain devoted to reproduction and sexuality that seem to play a role.
Taken at face value, this study strikes me as something that could then be a predictor of sexual preference, possibly before birth. Again, I'm not a biology expert, but I'd suspect brain asymmetries would exist from a very young age. Insofar that people have preferences about these things-- and I think it's a fair assumption to say that some people do-- then this could well lead further down the path of gene selection and choosing for yourself a child with characteristics you prefer. Without starting a holy war, I'm tentatively for gene selection, though could well be swayed with a convincing argument. I think you'd make the same arguments for gene selection of children that you'd make for coercing them to eat their vegetables, though part of your gene selection decision helps form the preference set by which you are supposed to be acting on their behalf. Yikes. Would you then have to play by some overarching set of preferences above both you and your child? This gets messy very quickly.
Interesting, too, was the part at the end concerning tendencies of men for younger partners, regardless of sexual orientation, and the opposite in women, again regardless of sexual preference. Once more, taken at face value, doesn't this lend towards a stable (unstable) equilibrium for heterosexual (homosexual) relationships?