Sopsokha-Village :

A tiny village located in the midst of paddy field. It is believe that  Lam Drukpa Kinley the divine madman was followed by demoness till Sopsokha village. It is here where he has subdued the evil spirits.He used the phallus as a medium to subdue and discipline the malevolent Spirits. And to celebrate the victory , on the exact spot Chimi Lhakhang was constructed later on by Lama Ngawang Chogyal.

So maybe thats why you may see the phallus painting at almost all the house of Sopsokha Village.