Penn Jillette of Penn and Teller fame has patented a "Hydro-Therapeutic Stimulator", which uses a hot tub for stimulation.
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| Number | Title | Issue Date |
| 5283908 | Elastic garment with displaceable section An elastic garment stretched from the wearer's shoulders to the legs and encircling the wearer's legs with leg portions and having a crotch section covering the wearer's crotch and having a posterior opening which is covered by a posterior cover formed by... | 02/08/1994 |