This latest addition to the series is, unfortunately, as lackluster as #3 was exciting. It suffers from a bad case of "T-Bone-itis". That is, too much "exposure" of Mr. John T. Bone and not enough of anyone else. Another "bone" of contention is that, unlike #3, whose cast was almost exclusively real swingers, #4 resorts to using some rather well-known faces and tries to pass them off as "swingers". Unbelievable casting aside, the sex just isn't that hot for the most part. The restaurant orgy finale cooks, but everything which precedes it borders on the dull. Beyond the essentially pedestrian sex, the element most lacking here is what made #3 so great: the conversation in which elements of swinging are discussed in earnest. #4 presents Mr. Bone as a newly single swinger (his wife left him and he hasn't got a clue as to why), yet glosses over the difficulties of being a single male in the swing community. The dialogue merely serves as a clumsy segue to sex — which is not what the swinging lifestyle is about at all. If this is presented to your customers as a standard pro-am tape, it may do quite well, but devotees of the swinging lifestyle will be sorely disappointed.