I am not worried about aggression or anything, and I have paper towels in there cage. I don't really have a reason, I just do. I guess it's because my adult I have was routinely fed in the persons bathtub so he was used to that so I just kept how he was fed the same when I got him and keep doing it. ¯\_(ツ)_/¯
If the general consensus is that it is better to just feed them in the cage than that is what i will do.