To understand the depth of suffering, pleasure, and pain, and how it relates to enlightenment. It's the most central aspects of life. What purpose would it "not" serve knowing this things?
Alright, let's try again: Should sex feel better before or after enlightenment? Also how often do enlightened people cry? If an enlightened person stubs his toe, does it hurt? Does that pain = suffering? If so, do enlightened people suffer?
Does sex feel better before or after enlightenment? Also how often do you cry? If you stub your toe, does it hurt? Does that pain = suffering? If so, do you suffer?