Clearly, you have this position all wrong. The only correct way to participate is by doing it with two girls and one guy inbetween. Though this may seem very awkward and impossible, it can be managed. The guy bends over backwards, resting on a chair, or, if talented enough, the girls might be able to hold him up (bringing them in closer to create an "A"). One girl strattles the guy, while he performs oral sex on the other. Thus, creating the "Wobbly A."