If this turns out to be the case, and I agree with you that it will, one of two things will happen:
Homosexuality will run rampant and they'll implode - or - they'll look to other sources for women and explode.
What do you think a population gender imbalance of 60-40 men to women (or worse) would be like?
According to CIA World Factbook, it's more like 109 boys for every 100 girls in the 0-14 generation, so it's not that bad