@Candymon It depends entirely on the original word used. Aroused means more than getting horny. I think this was a poor choice of words used when translating
@Petnavis Based on the author's other works, the sexual implication wouldn't be surprising, but in the context of this manga the standard definition of "aroused" makes more sense to me. Agreed, it could very well be a poor choice of words.
On the other hand, I realize that me using "vitality" in my previous comment also has another definition that has a more sexual connotation...