Two Fish On A Plate

Two men were in a restaurant and ordered fish. The waiter brought a dish with two fish, one larger than the other. One of the men said to the other, "Please help yourself." The other one said "Okay", and helped himself to the larger fish. After a tense silence, the first one said, "really, now, if you had offered me the first choice, I would have taken the smaller fish!" The other one replied, "What are you complaining for; you have it, don't you?"