You usually see this as sitz bath, but I just saw "Sitz bones." My usual dictionary just has sitz bath

It should have been the word of choice on 6/6/06....

Is there such a thing as Hexaphilia, or does that sound too suggestive?

I thought haptic was a totally different sense than touch. Like when you are swimming laps in a pool and you get the sense that you are almost at the other end and start your turn, that's using your haptic sense.