The attraction isn't a sickness. It is a temptation, coming from sin. The dwelling and acting upon that temptation is what is sick. People can feel attraction to a number of different things.
But, hurting a child like that, retribution will be great.
If you are an adult, you should be held accountable for your actions regardless of circumstance. It is your choice, after all, on how you act. If you are under the influence of something, you still chose to use it and should be held accountable.
God bless