"Physical arousal" refers to the state of the body when it becomes excited or stimulated. It can include things like increased heart rate, rapid breathing, and heightened sensitivity. Full definition
Physiological predictors (like heart rate, pulse transmission, and skin conductivity) were observed and measured as levels of physical arousal in subjects, while affective predictors were observed in behaviors indicating the presence of various emotions and mood states. (gottman.com)
When one says that being gay is just about what body parts arouse you, I do not feel so much that I can count myself in that description, and yet that is likely an accurate description of someone else's experience, that except for physical arousal they would be gay instead of straight or straight instead of gay. (nakedpastor.com)
«Our findings are consistent with the idea that physical arousal improves memory, and those who need to learn information may benefit from taking part in exercise.» (sciencedaily.com)