Outside of an enema bag, the set-ups and scenarios from Enema 18 and Spanking 18 are virtually one and the same.  Now there's a pragmatic shooting strategy even Roger Corman could embrace.

Instead of beating the shit out of one another, brassy blonde Kat and brunettes Misty Rush and Rachel Lynn, this time, share pleasantries and a group enema, answering the $64,000 question, "how's your water?"  Rachel is first to get it up the ass, with intermittent cutaways to an inhaling/exhaling enema bag.  Kind of reminds you of a scene in Donovan's Brain.

In the follow-up set piece, Valeria, Melissa Monet and Rayveness make a transition from a discussion of antiquarian law to enemas, proving only that in tapes such as this can you go from the plight of Chechnya to having a nozzle stuck up your ass.  Rayveness is the designated enemeé and the resulting tableaux resembles three collies cuddling to a nipple.  Kind of makes you feel warm all over.

Good thing the enema and spanking genres aren't crossover, or else astute viewers would notice a whole lot of similarity in Prestige's Student Fetish lines.  But you didn't hear that from me.