Heh, who needs vi4gra when one can have an ultrasound touch [1]. Given the right modulation and frequency, I bet it can be very effective. [1]http://www.bris.a

Heh, who needs vi4gra when one can have an ultrasound touch [1]. Given the right modulation and frequency, I bet it can be very effective. [1]http://www.bris.ac.uk/news/2014/december/haptic-shapes-using-ultrasound.html http://www.bris.ac.uk/news/2014/december/haptic-shapes-using...