If by ahistorical you mean we do not conform to Greek and Roman era of homosexual activity, you have to keep in mind there were societal pressures at the time as well. I don't think you can take those eras as a gold standard of laissez-faire approach to sexuality.

For the record, I am gay guy and whilst I can identify an attractive woman, it is such a fleeting attraction I can't ever imagine mustering the activation energy to even try.