Yes, it does have to be dead, and, yes, it does have to be an animal (teddy bears and veggie burgers don't count).
(Q1) Did you? (Q2) Which of your "sex ports" were in contact? (Q3) Species? (Q4) Presentation? (Q5) Etc?
If you answer No to Q1, skip the rest.
For example, if you like to tenderize your beef steak by cutting a hole in it and fucking it before throwing it on the grill, check 1, 7, 17, 29, 34, 35, 37. If you like to stab yourself in the stomach and fuck the hole with a dead squirrel, you might check options 2, 13, 22, 24, 34, 35, and 36.