Gay men, lesbian women, that won't solve the world's warring problems. They'll continue to fight amongst themselves and drag the rest of us with them as the wars escalate.
But you are on the right track. Historically, alot of the world's conflicts domestically or internationally is rooted in sex. It's the testosterone. If after fathering two children, a man would be castrated. Then there would be no more infidelity, no more machismo, no more territorial conflicts, power struggles, material wants, no more wars.
You are out of your mind. Show me how testosterone has anything to do with it. You could even just show me how sex has anything to do with it. I fail to see how mutilation is a remedy for anything. It is also perfectly clear that religion is the cause of the vast majority of conflicts. In the cases where it isn't, there is always a very strong ideology with the usual accompanying brainwashing.
Low testosterone has also been linked to a whole host of aged related health problems in older men. Having none would cause some really nasty hormonal imbalances.