The fine line that separates the "Seymore Butts" series from the "Buttman" series is becoming so indinstinguishable, that one of these days, I'm expecting Bruce Seven to come barging into Seymore's bathroom while he's jerking off to make some caustic comment about life.

The format, the camera angles, even the on-camera shtick of "Seymore Butts" is fiercely derivative almost to the point of being devotional in its mimicry. But what has lent the series its impeccability thus far is, plane and simply, Shane. Perhaps this is why Seymore Butts Goes Nuts rings a tad more hollow than most Butts offerings — less Shane, more shameless jump-through-the-hoop party tricks than usual rendered by the supporting cast to make up the difference.

Oh, to be sure, Shane's in here, but you won't find her gas tank parked volatilely up to Seymore's nozzle as in Seymore Butts Goes Deep. Armed with camera-in-hand for most of the feature, Shane plays second-fiddle in a show that needs a Stradivarius. The sex is probably hotter than your ordinary shot-on-video feature, granted, but less inspired to the broader, less stringent parameters allowed by free-hand gonzo, and certainly a notch below Seymore at his very best.

Blonde Sabrina shaves herself in a kiddie pool parked in the middle of a living room floor, then gets doggie fucked by the anonymous "Cock Ness Monster." This is good, clever stuff, possibly the tape's best bit.

A sunbathing Diva, after lengthy, coy palaver with Seymore, comes indoors to jump T.T. Boy in a variety of dance positions, with T.T. planting a wet adagio on her face. The ultimate narcissism follows when Seymore lenses his own blowjob as Diva satisfies him in the bathroom. A parallel scene comes later in the vid as Seymore, again, by way of a mirror, lenses his waxing by Shane in the toilet of a plane going to Toronto! The perilous set of circumstances answers its own question why this scene is hurried-up.

A threesome finally brings Shane into the hardcore picture when she joins Mark Davis and Rosie for a livingroom frolic that rolls out a variety of sex positions but encores what I feel is one of the most pointless exercises in porn: giving head to a strap-on. Exactly who's feeling the tingle, here?

The finale is worth waiting for, though. In their brief sapphic interlude, Sophie primes Tabatha Cash for their subsequent anal plunges by T.T.   Sophie's ass invasion is well-mounted and documented, Tabatha's more subtle and less obvious. Seymore's "bro" also joins in the action to partake of the fruits, but I suppose his "secret identity" is of the magnitude to actually warrant digitizing his kisser, as though he were a mob snitch. A mighty intrusive effect, though, when those blow jobs start coming with rapidity.

A humorous boxcover featuring Shane is a customer grabber.