Blue Angel and Katia de Lys have a wild threesome at the clinic
Scientific Guide to Edging (Stop & Start and Squeeze Technique) - Stamina Training Series Part 2
A House In The Rift: Chapter XVI - A Scientific Study Of Morning Wood
The Sex Researchers - History of Sexuality & Scientific Studies
Briefing to movie "Position "Lie / High" for basic vaginal sex". JVE scientific study by Sex Matrix.