[secret.asian.man]

I think the reason that it is bad is because the majority of hands he will have are either

a) hands that are ahead and raise (this is a very safe river and it will be easy for KK to raise)

or

b) hands you beat that he will bet for you anyway

The only time your donk is the right play is when he has a free showdown hand like 66. Do you honestly think that's what he has over 50% of the time, w/out any read?