2012-11-09
Explanation
This comic features a child asking his father an awkward question: "Dad, why do women call out during sex?" The father, sitting in a chair reading a book, confidently answers "Evolution." He then launches into a pseudo-scientific explanation, claiming that women are vulnerable to predators during sex and tend to close their eyes, so by emitting high-pitched sound pulses they can locate potential enemies in the area -- essentially describing echolocation. He further elaborates that the more pleasurable the sex, the more vulnerable they are to attack, and thus the louder the sound pulses become.
The humor lies in the father concocting an absurdly over-complicated evolutionary biology explanation for something he clearly has no real knowledge about. His theory is complete nonsense -- humans do not echolocate -- but he delivers it with total academic confidence. The child, impressed, asks "How do you know so much about girls?" and the father smugly replies "Pure reason," a reference to Kantian philosophy that also serves as a punchline revealing he has zero actual experience with women and is reasoning entirely from first principles (badly).
The votey panel drives the joke home further: the child asks "How come mom never checks for predators?" and the father angrily responds "F*** you, son" -- implying the child has inadvertently pointed out that the father's sex life is nonexistent or unsatisfying, completely undermining his confident lecture.