They "Hump Stuff."

As we all know, greatness can hardly be emulated. That's why all the most powerful beings never have children. I am absolutely positive that a lightwarrior is impotent. Nature would not allow such a powerful race to be created, because and evil character spawned of a Light warrior may be too much to handle.
I mean, freaking GARLAND turned into Chaos and nearly sent the world into an eternal time loop! What would hapen if Edge and Rydia actually spawned a little bstard who could be taken control of by the darker forces of the world!!!

But, to the point- The fact that they can't have kids means that they have no fear of ejaculating all over the place. (Or trying to anyway) So they definately hump everything in sight until they get old; then they probably eat a whole lot (Stamina issues.).
Besides, who would pass up a chance of sleeping with a Light Warrior? I wouldn't. I would bang some hot chick who could save the world and heal me and protect me from danger for the possible benefit of having a genuis child who might save the world when he grows up. I'd do it any day of the week. I'd do it all night long.

Except that Mime from FFVI. It's already married to that Zone-Eater thing, if I'm not mistaken.