Do you +fav all deviations that contain your stock?
Yes. All work that contains my stock will be added to my favourites and/or wish list so that I have a record of work containing my stock.

Can I use your stock in Prints or outside DA?
Absolutely On the condition that I am notified and given full credit. On rare occasions I will deny the use of my images if I feel they are being abused- i.e Pornographic context

I want to create a deviation that contains explicit content, would you mind me using your stock in it?
So long as it follows the dA Submissions policy I don't mind at all