The wonder of it. I stroke the cat. His pleasure is apparent. But where in a physical thing, even a living physical thing, is its pleasure, its surprise, its fear, and the rest of its sentient states?
A philosopher is one who is open to the strangeness of the ordinary. The strangeness elicits his lust to conceptualize, to rationalize, to understand.
In the end, however, the mystery of sentience, along with the other mysteries, darkly feminine, resists his advances. His log0-phallic thrust is no match for her chastity belt.
"You may approach, but you shall never penetrate!"