A man and his female best friend, who already has a boyfriend, test whether friendship can survive a full-body oil massage and intercrural play. Wearing embarrassingly revealing treatment outfits, they rub their slick bodies together until she notices his erection. Although she cries, “Why are you hard?” their awareness of each other and their desire keep rising. Her wet pussy grinds against his cock as the experiment asks whether lust will make it slip inside.