no one will farm infertile field , unless someone started

there are some theories:

1, no one will farm infertile field; unless somebody started. (瘦田冇人耕, 耕開有人爭)

2, beautiful girl (boy) is attractive, but people usually don't head for her (him). since people may think, such a beauty must have the other one already.

these common "wisdom" has some relation.

some rare thing (may be beauty, good, or may be ugly, bad), if someone start it, the original mind-set will be broken, and people will all go for it. (2) show the reason. and (1) presenting the action.

so, by playing the trick, one can avoid (using) this as a way to reduce the number of competitors (increase attraction). the secret is keeping people mind-set.