files/definitions-offensive

Viennese Oyster: 
Lady who can cross her feet behind her head, lying on her back, of course.
When she has done so, you hold her tightly round each instep
with your full hand and squeeze, lying on her full-length.  Don't try to put
an unsupple partner into this position --  it can't be achieved by brute force.
You can get a very similar sensation -- unique rocking pelvic movement -- with
less expertise if she crosses her ankles on her tummy, knees to shoulders, and
you lie on her crossed ankles with your full weight.  Why "Viennese" we don't
know.  Tolerable for short periods only but gives tremendous genital pressure
for both.
		-- The Joy of Sex