By coincidence, I just happened to be reading the incident in "One Million Dead," (by Jose Maria Gironella, on the Spanish Civil War) where the far-Left commander Buenaventura Durruti is leading a column of Anarchist troops to try to take the city of Zaragoza. The effort fails, partly just from anarchists-being-anarchists, and partly from the sexual disorder sweeping the ranks, with venereal diseases having a greater impact on the troops than even mortar injuries.
At one point Durruti separates out all the homosexuals and gonorrhea-infected militiawomen from his forces, puts them in boxcars, takes them off on a a railway siding, and mows them down with a machinegun.
Not my recommendation, by the way.
But it does show tht even the Left found that sexual disorder (including both females and homosexuals) is incompatible with combat-readiness.