That was a joke. Let me tell you the reason why it is funny...
Which side of the chicken has the most feathers?
Which side of the chicken has the most feathers? The outside
This joke is also an elephant joke. The humor lies in the absurd logic of the joke. The listener assumes that the person is talking about the right or the left side of the chicken, when the jokester instead is talking about the inside verses the outside of the chicken, which aren't really sides (even if they have side in their name).