Why do runner beans climb anticlockwise?

[Typo]

I believe that runner beans always climb anticlockwise (as viewed from above). I've heard that this is due to them following the sun, but in the northern hemisphere the sun rotates clockwise. If the sun theory is correct one would expect them to climb in the opposite direction in the southern hemisphere. Do they?

[Clareb]

If it is in fact true that they grow anticlockwise then it is probably for the same reason that water runs down a plughole anticlockwise in the northern hemisphere. If you're standing in the Northern hemisphere then the earth is rotating anticlockwise. Although we can't detect the movement beyond acknowledging the passage of the sun across the sky, I would imagine that plants growing upwards would be propelled in an anticlockwise direction by rotational pull of the earth's spin. I don't know if this is fact but it's my spin on it...so to speak!