In terms of what is natural, I think the analogy of cutting hair and the use of the anus for sex is a poor one. Its a question of the evolved function of different parts of the body. The function of the anus is form a channel to excrete body waste not receive a penis. There is also the question of public health(think E. Coli). Cutting hair simply relates to grooming.

We are ever evolving and 99.9% of women who give birth do not eat their afterbirth, however there are a few who still practice one of nature's ways of giving energy when it is much needed; it is however a natural practice.

>>Nature never intended us to shave<<

True that. But clearly it never intended us not to shave - or it wouldn't have given us the capacity to fashion razors. Or use them.

>>hair is there for a purpose<<

Is it? I can't think what purpose that might be other than vanity. It's certainly not insulation; woven fibres and animal furs do a much better job than our meager covering of hair. Other than harbouring lice I'm struggling to see what purpose hair serves. But if it's there I guess it has to serve some useful purpose, right? Like gout.

Tell a lie, some hair is useful: life would be a bugger without eyelashes (eyebrows, nostril hair, etc.). But I only shave my facial hair and I can assure you it has no useful purpose in such a warm climate beyond becoming uncomfortable and irritating if I let it grow too long.

>>therefore as nature intended some of us to be hairy then shaving is an unnatural practice for the hirsute<<

Maybe. But nature obviously never intended us to be hairy: if it did it wouldn't have given us the intellectual capacity to invent hair-removal methods or the manual dexterity to apply them. If nature had truly intended us to be hairy would we not have feeble little arms like the offspring of a T-rex that had been taking thalidomide, unable to bring a razor to our face or tear off a waxing strip?

>>Other examples: the vagina is designed<<

No it isn't. And if it is I - and a lot of other people besides me - would like to have a few words with the engineer in question. Words such as: "What on earth were you thinking", "Were you high?" and "Look, we all appreciate the effort that has gone into the aesthetics. It's not the form we're contesting but the function: why so close to the anus? What were you smoking? Didn't you study basic microbiology as part of your Human Engineering Degree? With the blueprints you've given us the female model is going to be at a much greater risk of urinary tract infections than might otherwise be the case, if you hadn't cocked up. And didn't it occur to you to get in touch with Hodgkins who was heading up the Juvenile Model Department? Looks like somebody was using the Metric system for the juvenile model and Imperial for the female model. It won't fit! Am I the first person to have noticed this? Smith, you're off reproduction. I want you well away from any major systems from now on: you're demoted to earlobes."

>>the anus, on the other hand, is designed for one way traffic<<

In a galaxy far, far away...

>Smith! Into my office NOW!

<Yes, sir?

>Smith, what am I to do with you? I gave you a second chance after the vagina fiasco of stardate 43582.6. I'd always admired your work on the aesthetic design even if there were... other oversights. You turned out good work in the earlobes so - against advice from HR - I promoted you to the Waste Management Department. Smith, what does the phrase 'one way' mean to you?

<A sh!tty boyband from the early 2100's?

>I didn't study Arts, Smith. One way means ONE way! Got it!? As in things only go one direction. Smith, what's wrong with this anus?

[Pulls a VERY lifelike arse from behind his desk]

>I'll tell you what's wrong with it! It doesn't go one way!

Smith, I can poke my finger up there quite easily - and the Human's digits go just as easily. I've just seen modelling from the Male Division which suggests it can accommodate somewhat more than a finger but that data is still speculative. Nevertheless you have clearly failed to grasp the meaning of 'ONE way'. I've been experimenting with this prototype anus all afternoon and can move my finger back AND forth. That's two ways, Smith.

<mumble mumble repro mumble mumble intellectual mumble

>What, Smith?

<[clears throat] I said, sir, that we already thought of that - and solved the problem - but the Reproductive team in the female division are claiming some intellectual property bullsh!t - 'prior discovery' - some rubbish legal phrase 'vagina dentata', whatever that means. Basically sir, we wanted to install teeth to make it a properly one way system but legal got in the way.

>Legal, huh?

[A gleam forms in his eyes]

Fcuk those legal fcuks.

[Fade to a scene of a man having his dick bitten off by anal dentata]

Good ones, Tony; did you write for 'Honi Soit'?

Hair does have it's uses. It stops sunburn of the pate; aids the evaporation of sweat and the facial hair when grown to beard length is most useful, acting as an extended evaporative surface in hot weather and retaining an insulating layer of air in winter.

There are stories that damsels in distress have used their own long hair as a rope with which to effect their escape from towers and the like.