Does it matter what kind of yogurt I use?

It depends how long it takes to get to the customer. Use specially designed breathing bags that allow carbon dioxide to escape and oxygen to enter the bag.

Personal opinion, I'd say the fuller the better. Skim milk might make it watery rather than viscous.

Yes, it would matter. Using self-rising flour with water and salt (and maybe butter) would create a biscuit instead of a hardtack cracker.

Not without melting the yogurt coating. They should pull apart fairly easily, though.

Paralysis, and prolonged exposure (especially to the neck or heart) can kill. You could incapacitate someone, but if not careful, could outright kill or permanently paralyze.

Once a week or so should be good. Don't do it too frequently. Oily skin can be treated with masks more frequently, about two to three times a week. Yogurt...

Some film is higher quality than others, but nowadays, the choices are more limited. If you are new to film photography, try a cheaper film like Fujifilm's FujiColor. It is...