There's only one problem with this. If a Vulcan male had sex only in one time period in seven years and the female does not conceive he has wasted a huge amount of energy for nothing. The mating cyce HAS to be linked to a female estrous kind of thing or it is senseless. The purpose of high sex drive is reproductive success, not emotional or physical satisfaction. Lousy sex still makes kids. It is clear that Vulcan males are terribly agressive, high testosterone, male animals. Women fear them.