Dan is joined by Christopher Ryan, coauthor of Sex at Dawn. The two attempt to tackle your freaky sex problems from an evolutionary psychologist's perspective. Dan just wants to talk about plunger dicks, big sperm babies, and bonobo vulvas. Science! 206-201-2720 This episode is brought to you by Audible. Download a free audio book of your choice today here: http://j.mp/savageaudible Check out Dan's It Gets Better Project. Today's episode is brought to you by Get STD Tested. Call today for easy, reliable, and confidential STD testing: 888-387-1879