Leaving aside for a second the alleged and surprising conversion of Cecil to Intelligent Design and perhaps Creationism:), there are a few facts to be considered about the “design” or “non-design” of the holes in our bodies…
Most orifices in the body are BOTH an entrance and an exit, or at least serve more than one function.
The mouth is mainly an entrance but is used for the expulsion of mucus during colds and flus, and for vomiting, which, disgusting as it seems, can actually save your life in cases of food poisoning. In addition to being an entrance for food and water, the mouth can be used as an entrance for the penis, which is a wonderful way to reward that special someone in your life, ladies and gentlemen.
The nose takes in AND expels air. Also, it traps incoming dust particles which are later expelled or removed in dried (snot) or liquid mucus.
The eyes (if you want to consider them orifices) do their obvious work of accepting light images for processing by the brain, but they also excrete tears containing feel-bad chemicals, which is the reason we feel better after a “good cry”. Tear excretion also helps remove foreign objects that could damage the eye and signal our emotions of extreme sadness to our fellow social humans.
Nothing much goes into the piss-slit on the penis, I guess, but it IS noteworthy that the penis serves a triple function, as a conduit for urine, as a pleasure organ and semen conveyor.
The vagina/uterus system is DEFINITELY an exit as well as an entrance. I myself came out of one. You too I suspect. And unless your name is Jesus, I am pretty sure something went in there nine months earlier.
Which finally brings us to the anus which, we are sometimes told, cannot reasonably be considered anything but an exit, and cannot possibly have more than one function. This, in spite of the fact that the rectum on any healthy person is empty 90% of the time, and that millions of people can and do derive enormous pleasure from being anally penetrated.