Solving riddle before sex

Eva Murkovski dreams of traveling the world, but she needs to learn geography perfectly for that. Unfortunately, the cutie faces some problems memorizing the positions of the countries on the globe. So, she takes several private lessons, but she still fails to learn everything needed to become a successful traveler. Eva Murkovski can't even memorize the position of Germany. She keeps pointing only at countries that are colored pink. The teacher feels puzzled at first, but then he notices the color of her panties and figures the riddle out.