There is, but only so long as you follow the core tenant of the theory of Lesbionics. You have to make them crave your cock. Otherwise it just doesn't work. This is pretty much the inverse of the Law of Only Gay for Me (also known as the HaremMastersexual-not-Homosexual Law). Specifically, this is the Only Straight for Me Law. It's vital that it's followed for proper Haremdynamic flow.
Right, the swag coefficient is x1.5 for sisters and x2 for twins. This, of course, is multiplicative throughout the entire set. Triplets is x4, quadruplets is x8, and so on. Two sets of twins factors out to x4 across the entire set, and triplets with an additional set of twins is x8. Make sense?
Also, traps either fit in under Only Gay for You or as a girl depending on their Bridget factor, sexual preference, and personal habits.