Colossal's Bitches in Heat 2 is a gonzo film, so I don't know how the characters are developed to telegraph that these women are actually "bitches" and how they are "in heat," but I will support them in their self expression.
There is some serious stuff going on in the boxcover.
Eva Angelina is twisting her nipples, as if to say, "Gram, I am complicated; sometimes I feel low, a kind of Leonard Cohen low, but sometimes I am up, like Up with People, except I will fuck you until your glasses fall off, and they won't. Could you ever love me?"
Michelle Lay was instructed to put her finger in her mouth. The less said about her the better. I think, in general, that fingers in mouths is aa porn convention that should go the way of not shaving.
In the black bustier is Michelle B., who isn't a Spice Girl.