Grace & Peace!
Common sense is real. The parts don’t fit.
As an argument, this is incredibly reductionist and unconvincing. “Common sense” should have indicated to you that there is more than one way to share sexual pleasure than insert tab A in slot B.
Additionally, your language invokes a metaphor of machinery–the body as mere machine, reducing sex to the movement of pistons in their sockets. Is that your understanding of sex? Are you arguing that sex is merely the utilitarian act by which both the machine is replicated and the genetic code by which the machine functions is pushed through to another generation? This is a highly sterile view of sex and sexuality. I hope you do not, in fact, share it, and that in using your machine metaphor you were merely and unthinkingly giving credence to a silly trope/cliche.
But finally, the ease with which “common sense” arguments are expressed through cliche is irksome as cliche involves a movement from the particular to the general such that the actual nuances of meaning
by which meaning is actually made or understood are largely lost in favor of the whitewash of generality. “Common sense” comes off as merely ignorant, shallow, or narrow in the process. Was this you intention–to show up common sense for a fraud?
Regarding common sense being grounded in the supernatural, it is, in fact, grounded in culture-- which is to say it expresses a series of cultural tropes, stereotypes, prejudices, and is representative of cultural conditioning, not supernatural origin.
Under the Mercy,
Mark
All is Grace and Mercy! Deo Gratias!