Male babies are 'foreign' objects in their mothers' wombs. That's why homosexuals exist.

Here's the latest piffle from the Genetic Determination crowd.

From the 100% completely and utterly heterosexual BBC:

Writing in the journal, Professor Bogaert said: "If rearing or social factors associated with older male siblings underlies the fraternal birth-order effect [the link between the number of older brothers and male homosexuality], then the number of non-biological older brothers should predict men's sexual orientation, but they do not.

"These results support a prenatal origin to sexual orientation development in men."

He suggests the effect is probably the result of a "maternal memory" in the womb for male births.

A woman's body may see a male foetus as "foreign", he says, prompting an immune reaction which may grow progressively stronger with each male child.

Penis bad. Vagina good.

The antibodies created may affect the developing male brain.

In an accompanying article, scientists from Michigan State University said: "These data strengthen the notion that the common denominator between biological brothers, the mother, provides a prenatal environment that fosters homosexuality in her younger sons."

"But the question of mechanism remains."

Andy Forrest, a spokesman for gay rights group Stonewall, said: "Increasingly, credible evidence appears to indicate that being gay is genetically determined rather than being a so-called lifestyle choice.

What else would a professional sodomite say?

"It adds further weight to the argument that lesbian and gay people should be treated equally in society and not discriminated against for something that's just as inherent as skin colour."

Oh, yeah. Right. He'd also compare himself and his buddies to Rosa Parks.