“I want to know why men are so eager to have sex without a condom.” A college student majoring in psychology makes her porn debut to understand why guys want to cum inside despite the risks. Having never experienced a creampie herself, she uses her own pussy for some very hands-on research. She gradually discovers how good bare cock feels and starts cumming from it. A former naginata practitioner, she also changes into a martial-arts uniform and gives him a handjob using the weapon until he ejaculates.