This sounds very interesting I may have to look this one up. But before I run out and get the book if you could enlighten me on the purpose (other then shear fun) of this exercise.
The idea, I assume, is that the partner who is going through the exercise will become more aware of his/her five senses, since only one will be used at a time, and he/she will be blindfolded and thus concentrating on the one sense and not be distracted by vision. Tantra means "weaving", so I guess the intent is to become more aware of each sense and then become aware of how all senses are "woven" together to form one whole. Some of the tantra exercises are bizarre; I am not putting on a turban and loincloth and dancing for my wife!! But the Sensory Awareness exercise and others look interesting. I haven't tried any yet; the Sensory exercise I did with my WS is for one to lead and the other to experience and then the roles to be switched. So, I am waiting for what my WS will come up with.