And therefore man himself also might very well have enjoyed absolute power over his members had he not forfeited it by his disobedience; for it is not difficult for God to form him so that what is now moved in his body only by lust should have been moved only at will.
We know, too, that some men are differently constituted from others, and have some rare and remarkable faculty of doing with their body what other men can by no effort do, and, indeed, scarcely believe when they hear of others doing....Some have such command of their bowels, that they can break wind continuously at pleasure, so as to produce the effect of singing.
-Augustine, City of God, p.472 (14.24) Made aware of this extract from http://en.wikipedia.org/wiki/Flatulist
There you have it. If you know someone who can fart perpetually and at the command of his own will, you have yourself a modern testimony to the Edenic condition of our first parents.