Lead

Not the verb, the heavy metal.

In related news, Atrios points out that my beloved Mütter Museum in Philly has a special exhibit on the impact of lead on public health

A good test to see if a person is marriage material is to take them on a date to the Mütter Museum.

If they "get" it then you've got yourself a keeper.

Mr. Duncan Black has no guts, he should go check out the guts display on the ground level.