Sexual chemistry refers to the connection or attraction between two people that is based on their sexuality. It involves a combination of physical, emotional and intellectual factors that create an intense bond between individuals. This can include shared interests, values, sense of humor, and other traits that make them compatible in bed and out of it. Sexual chemistry is often described as a "spark" or "magnetism," where two people feel an instant connection and desire to be intimate with each other. It's not always about physical appearance but rather the way they communicate, touch, and interact that creates this powerful attraction between them.