Magical boys sounds pretty fun too, but I'll say their a little bit rarer than a magical girl at least in the past, but that's definitely changing, because a lot of masculine urges for sex and control naturally lend one's self towards being a lawful or chaotic devil. Again obviously this is a generalization, everyone's different, but it is a stereotype people have in the setting.
Magical boys and men too? And so for marketing our Devil finding out that sex sells image which increases power from veneration.