Shallow thrusts only
Medium depth thrusts only
Deep thrusts only
Alternating shallow, medium and deep thrusts
Alternating shallow and medium thrusts
Alternating medium and deep thrusts
Alternating shallow and deep thrusts
I don't like penetration at all
Classical IQ Test
3-D shapes, complex words, and number puzzles. Not the best sci-fi movie, but it makes for a great IQ test! ...
