User blog comment:B214/Question and Answers/@comment-24.2.168.254-20140102070939/@comment-16281343-20140102071604

Imo, that's just Aza joking with Issei and he took it literally.

Because at first, Aza said the evil(pervert) Issei shouldn't touch her because he might be purified but at the next statement he said that that works on those who have evil intents. So does that mean perverseness equals evil intents? I think not.