[tome]

> Option's should not be part of the function signature unless it is important to the logic of that function.

Yes! Absolutely. Very important observation. In fact in Haskell Maybe should not be part of the signature if you want to return Nothing whenever one of the arguments is Nothing.

> And an uglier, but fun, point-free version

Yikes, please don't! People might get the wrong idea about how good Haskell is written.