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I saw that Dick recommends using ultrasound gel (with a condom to protect the device) and it looks like all the practitioner videos do this also.
But I saw a comment Still Limppen made on the blog:
"About skipping the gel, the treatment routine is a lot faster, less awkward and doesn't need cleanup afterward.
Treatment can be much more spontaneous. And that's good in the long run.
I just reach inside my knit knickers, grab the cock head, stretch it out and then start applying the shocks over the thin jersey material.
I get good contact and easy movement."
Has anyone else experimented with no gel and gotten good results?
And re: condoms, do you think it makes a difference how thin the condom is (maybe thinner impedes the shocks less)? And are regular lubricated condoms safe to use with the device?
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I think the main reason for the gel is to make it easier to slide the head around. The pulses are strong enough that I doubt the gel or thickness of the condom makes any difference.