Koh Samui can be a wild place in some areas and this phallic monument is definitely not out of place there.
I had to ask a friend to stop, when we drove by. It is really huge, about 4 meters tall. I am not sure, why it was Erected there. It is not a tourist attraction yet, as I surfed internet to find any info on it. It is on a small road in front of some residential properties. There is a similar explicit tourist attraction on this island called grandfather-rock.
You see one and you have seen them all. 26000 views (Nov 2013), may make it a tourist attraction soon..;-)
Entered in TTT photo competition Nov 2013. No, the theme is not the biggest. The theme is Red - blue - yellow!!