from www.asylum.com – We’ve arrived at a juncture in celebrity culture in which many Hollywood types have become more active on the amateur sex-tape circuit than in studio films.

And it’s about time that there was a system for critical feedback of celebrity sex-tape performance. Thank goodness, then, for sexologist and couples counselor Jenna Brett Ashley, who recently released the eBook, “Best Blowjob in Five Steps: The Art and Science of Mind-Blowing Fellatio.”

And Ashley was generous enough to sit down with Asylum and take a closer look at four especially notable celebrity sex tapes and assess the female participants’ fellatio skills.

Keep reading for our below-the-belt guru’s instructive insight, constructive feedback and an evaluative rating for each celeb.

Paris Hilton, “One Night in Paris”:
Paris Hilton craves personal validation more than she craves giving blowjobs. In her first oral sex scene from her now infamous celebrity sex tape, she bluffs her way through it, eventually saying she doesn’t like it.

In her second attempt, she’s somewhat passionless in the beginning, but with a sudden surge of admirable determination, she begins experimenting with different approaches, albeit in a mechanical fashion.

She finishes with more ardent sincerity, but I think her guy was not quite as blown away as he could have been. However, Paris seems to possess a genuine toolbox, and my instincts tell me that if she felt more emotionally connected to her guy, he would be a very lucky fellow indeed.

Rating: Half-Mast

Pam Anderson, “Pam and Tommy Lee: Hardcore and Uncensored”
Clearly, Pam Anderson is ready and willing to drop down below on any given occasion: on a yacht on vacation, on her way to vacation in an SUV, or on a private boat docked on a Lake Mead campground.

And that’s exactly what I like about Pam: her attitude. Although the blowjob shots are cut up, not showing before and after, it’s clear that Pam possesses what blowjob-poseurs don’t.

She’s in tune with Tommy’s rhythm. And secondly, her hand-and-mouth coordination is off-the-chart.

Rating: Full Tilt

“Survivor” Star Jenna Lewis, Wedding Night Video
If giving a blowjob was more like competing in the Tour de France, you would want Jenna Lewis to be your lead rider. She’s a tad silly for this voyeur’s taste, but who isn’t when they’re joyously in love?

Jenna’s got the fundamentals to be a blowjob ace, but she often breaks cadence randomly, abruptly shattering any notion of rhythmic coordination.

Ultimately, she’s not mating her physical tactics together with his reactions. It’s as if she’s giving her partner the blowjob for her own personal aggrandizement, not his.

Rating: Cocky Wonder

Kim Kardashian, “Superstar”
Kim Kardashian seems more like she’s coming out at a debutante ball than trying to make Ray J climax. Stunner that she is, she waits and watches Ray J, nonchalantly doe-eyed and amused.

She clearly takes a few BJ-giving cues from Jenna Jameson, twisting and pumping with her hand while servicing him. Kim is so sexy, her presence serves as a kind of substitute for some of the steps of giving a mind-blowing blowjob.

Still, she seems to confuse the height of his erection for the height of his pleasure. Someone needs to explain to her that men are capable of far more than just being hard. Sexual potential is a terrible thing to waste, and the mystery of men is in their ever-present switch.