Where did you read that?
In most RPGs you play, if you drop all the precious gear you have, your high level character would face difficulties facing tough enemies. Ains had nothing on him, except those ice cream sticks he haven't even used yet. If you think about this fight, Shalltear would have died much earlier without that life sucking lance of hers. She also had the badass looking armour. Typically mages fare better if they have a meatwall between themselves and the enemy.
He's a fricking lich. It has been said multiple times that whenever he starts to feel any strong emotion, it gets wiped off. Not to mention he's all bones (a human dick doesn't even have a bone inside it, unlike some animal members, so he has got nothing down there). He's not gay. He's asexual for a very good reason, unless he somehow decides to change things.