> The only seat that can perhaps be related to a toilet and in that I 
 > mean where the center is missing or a depression exist is in a few 
 > women's models.
There are at least THREE seats of this sort in the marketplace, including 
Terry (though the catalog that I got yesterday doesn't list theirs), the Dual 
Action Bicycle Seat, and the EZ Seat.  I use the DABS--it's comfortable.
ben@twty.chi.il.us
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