The Flatiron Sex Position is a rear entry position with great g-spot stimulation and deep penetration enjoyed using a Liberator wedge or pillow. This Pin was discovered by Women's Health Australia. Discover (and save!) your own Pins on Pinterest. Sex position #95 - Flatiron. Kamasutra. This position is a breath of fresh air to the stagnant sex life of both partners. It seems that there is nothing.