On advice from the forum, I picked up some Probe Thick Rich at Walgreens. Without a doubt, the choice of lube makes a big difference. Up until now I had been using ID Glide; it had a tendency not to stay where I wanted it to stay, and was difficult to apply in the right amount to be comfortable during my sessions, and did not seem to last very long. A little of the Probe lube went a long way, and lasted...