I got a young girlfriend and I'm getting old enough to need a proper medical checkup, so I decided to have a three-day, two-night medical checkup at the clinic where my girlfriend's best friend, Rika, works... Rika is a beautiful woman with big breasts, and as she presses against Rika, my penis is on the verge of exploding! I know it's wrong, but she doesn't seem to mind, so we had sex like crazy for three days.