I can't speak for a broad period of time, but Tacitus speaks of the sacking of Cremona (which was a Roman settlement to add to it) where young girls and boys were raped and killed by the soldiers.

Thus forty thousand soldiers burst into the town with a yet larger crowd of servants and sutlers, even more depraved than the soldiers in their readiness for cruelty and lust. Without any respect for age or for authority they added rape to murder and murder to rape. Aged men and decrepit old women, who were worthless as booty, were hustled off to make sport for them. If some grown girl or a handsome youth fell into their clutches, they would be torn to pieces in the struggle for possession, while the plunderers were left to cut each other's throats. Whoever carried off money or any of the solid gold offerings in the temples was liable to be cut to pieces, if he met another stronger than himself. Some, disdaining easy finds, hunted for hidden hoards, and dug out buried treasure, flogging and torturing the householders. They held torches in their hands and, having once secured their prize, would fling them wantonly into an empty house or some dismantled temple. Composed as the army was of citizens, allies, and foreign troops, differing widely in language and customs, the objects of the soldiers' greed differed also. But while their views of what was right might vary, they all agreed in thinking nothing wrong.

Cremona lasted them four days.

http://www.gutenberg.org/files/16927/16927-h/ii.html#The_Fate

Tacitus mentions this as an atrocity in itself outside of the sack and loot, so there was taboo about young people (and old) being subjected to this.