There’s something wrong with you if you do this to another human being especially someone you love. Everyone should have their own privacy and no one should violate that. There’s a brilliant book by a guy called Lundy Bancroft that blasts the Heartbeat Nurse Penn State Shirt myths around domestic abuse and one of them is mental illness. A lot of abuse is planned and is a pattern of behavior based on underlying beliefs and attitudes that are deeply rooted. I think mental illness is a reason people come up with when they hear of horrific crimes or abuse because as humans we don’t want to accept that someone who is perfectly sane can do such things.