how to sweeten sour oranges

I don't like sour oranges, Most of them usually end up in fridge. I came across this nice little tip that promise to reduce the sourness in oranges. The trick is to induce the production of juice in oranges so that the soury taste can be reduced through dilution before you actually eat them. Place the orange inside a container and shake it hard. The impact which the sour orange suffers will lead to production of juice inside, which will then reduce the sourness of the fruit.

I don't actually know if it works, but I guess the orange will become very watery or juicy. Not actually turning the orange from sour to sweet, but just reduce the level of sourness so it is bearable.