I think many mental issues are caused by demons, while others are caused my chemical balances and still others from brain damage. (or an admixture... perhaps caused by family line!... The sins of the father pass on to the 3rd and 4th generation?)
To anyone here with a boyfriend or girlfriend:
If you wish to avoid lustful actions, never be alone together. If you're alone, thoughts will arise, temptations will occur and left long enough, you will fall. That is inevitable. The only certain way to avoid the situation is to avoid the conditions of the situation i.e. do not be alone.
[more debate about how slavery isn't all that bad]
And in unrelated news, I don't see something wrong with owning someone. I don't think it treats him as sub-human. There are many authorities who have (by definition) authority to do a lot more than us, yet are they super-human? No. They are privileged for various reasons, often because of responsibility.