Would you use the spare head...

[Alex L]

with the kind expression, or stick with the one we all know:

[beutelwolf]

I think the so-called kind expression is a better likeness, though the words "kind expression" could be in violation of the trade descriptions act (or whatever it's called).

[Arginald Valleywater]

An extra head will balance out his lack of a second bollock.