[Boyfriend] A black man moved in next door to my house. He was friendly and we quickly became friends, so I invited him over to my house to learn English. A few days later... I had a different sensation during sex with my girlfriend, who I live with. My vagina lost its tightness and ended up unsuccessful that day. I couldn't ask her why, and now it's looser than before. [Girlfriend] It was the first time I'd experienced stimulation deep inside my vagina. I was awakened to a pleasure I couldn't experience with my boyfriend. I love my boyfriend. But my vagina wanted a thick one.