Pedophiles ??

I was trying to google if it was classified as a mental illness ?? Or disorder ? I don't think it is ? I feel as if it were to get seen this way they would get away with a lot of it . Because they're not in a right state of mind if it gets classified that way but I don't think that's the case these people who hurt kids this way they know it's wrong and that's why they hide it they know wrong from right . Anyways I think they should get locked away for ever but anyways what do you think they should be classified as ?? Disturbed ? Mentally ill ?? Or just send them to jail like any other crime that's what I think .