This was recommended to me, but I haven’t read it yet. Please feel free to debate in the combox.

P1: If human beings:

(1) would produce extremely disgusting, abhorrent, horrible, pestilential, totally ugly results,

(2) those results would be due to no fault of their own,

(3) assuming that (some of) those results would help to attain sufficiently important goals, there could be imagined other, much more aesthetic ways to achieve them without anything of importance being lost then they probably are not the creation of a perfect being.

P2: Human beings:

(1) produce extremely disgusting, abhorrent, horrible, pestilential, totally ugly results,

(2) those results are due to no fault of their own,

(3) even if (some of) those results help to attain sufficiently important goals there could be imagined other, (much) more aesthetic ways to achieve them without anything of importance being lost

Those results are also known as the “physiological horrors”: feces, intestinal gases, putrefaction, mucous membranes, perspiration, etc.

C1: Thus, human beings probably are not the creation of a perfect being. (From P1 and P2 modus ponens).

P3: But theism affirms that a perfect being created human beings.

C2: Therefore, theism is probably false. (C1 and P3)

LINK (HT: Mason)