@carygoh - I believe in a functional relationship, both parties should be in a position to discuss such an issue with the sensitivity it calls for and look for a solution. The lady/man doesn't necessarily have to tell their spouse that they are bad at bedminton. They can make suggestions pole pole and see how things go - experiment together. But they should make sure not to use "door in the face" technique lest their partner imagines they are playing away games. Where possible, one should also explain the source of their idea.
But for this to work, you have to be very close to each other and open minded. If for example mama Mburu tells @guka out of the blues "Hebu wacha mimi ni hang kwa ceiling na wewe usimame na kichwa..." the next thing she knows, wazees will be summoned for her to do some explaining!
Never count on making a good sale. Have the purchase price be so attractive that even a mediocre sale gives good returns.