OMFG! Not the rats! Not the rats! Why the rats... How could they hurt rats... -sob-
I think some, limited testing could be justified, as long as it doesn't involve hurting the animals. For example, rather than deliberately giving mice or rats cancer, just use animals that have already got cancer. If they're going to die, it might be worth trying to save them. As long as it's not painful.
But not for cosmetics. Under no circumstances, ever. That's just plain sick!
