It was a most unnatural act to put a plastic bag over one's head.

Landscape painting is not, after all, an unnatural act, although it might benefit from being considered so.

Of all the despicable things he had done in his life, this unnatural act was by far the worst.

"This is a very unnatural act," the warden said at today's news conference.

Often, successfully treating disease is, indeed, the most unnatural act in the world - and that can be a very good thing.

The law defined buggery as an unnatural sexual act against the will of God and man.

The law simply outlawed unnatural acts, which could even be committed in a sexual relationship between a man and a woman.

Arms are fragile enough just performing the unnatural act that is throwing a baseball.

The outcome of this unnatural act was a male whose name does not figure in any pedieree.

When the kitchen was finally finished, it spurred her to perform an unnatural act: making dinner.