An old fashioned leather bicycle saddle like a Brooks isn't actually a seat, evenly supported from underneath, but a sort of mini-hammock slung between one point at the front and two at the back. The point is necessary to remove the front slinging point, a hard place, from your soft parts. So that fixed the shape of the bicycle saddle forever even when the logic of the point disappeared in the general changeover to padded saddles. Cycling is an intensely conservative pastime.
A padded or gel saddle is different, the seating surface being supported everywhere. Now the point is said to locate the rider sideways, mainly by people who are trying to find a reason for the point because they have backgrounds in rational professions. It's amusing but unlikely to be true: If the point did locate the rider sideways, it would also rub the insides of his thighs raw.
I have little experience of the noseless saddles. They seem to me at least a compromise and more likely a botch. There is no independent reason for their existence except an unreaoning fear of being emasculated. I've ridden a few but wouldn't spend my own money on them.
Instead I went all the way to an ergonomically thought-through bicycle seat. The best of this type in my opinion is the evocatively named Cheeko90. See mine in action at
http://coolmainpress.com/BICYCLINGsmover.htmlI daily ride a modern development of a vintage bike, so more recently I chose a Brooks triple coil spring B73 saddle. But if I could find a Cheeko90 dressed up in an appropriate shade of leather, I would buy it in a flash.
Note that while I recommend the principle of the Cheeko90, and it seems at first to be sturdy, the apparent "MBtex" on the seating surface wears fast -- mine headed for recovering in under 5000km, which isn't good enough even for the €60 I paid. By comparison my superbly comfortable Brooks B72, while scarred in an accident and by zips and keychains on my street clothes, is unbowed by 6000km of hauling my 215 pounds, and clearly good for ten times that far. The B73, on sale at SJS at the time, cost £50, so it is clearly a bargain in the comfort stakes.
Andre Jute