Try drawing e.g. a quarter circle. The non-angle-preserving version will add a corner at the end to get back to the starting angle, the angle-preserving version continues along the circle.

the shaft doesn't run away from the balls. and yes, every single person who visited that site knows what i'm talking about

No, they don't. The fact that you seriously think all people automatically draw a penis says a lot.

Very serious are we right?