Hello AAAAA.

First my name is an anglicized Sumerian Name.
Which directly translated means Wicked, cruel, or evil spirit.
Your english word Demon comes from the anglicized Demios. Though in Truth the definition of the word now differs from its definition then. Your English word Cruel comes from the anglicized Xul.

No as babes have yet to develop a conscious so if they die before becoming aware of thier "Monkeyhood" to coin a term; they are reintegrated into the birthing process once more.

Succubi/Incubi are indeed a form of Demon as you would understand it. What do you think we do with all the cross-dressers?