In the Star Trek: The Next Generation episode "Phantasms," Data explores the world of dreams. As a result, he behaves strangely while awake.
In one dream, he sees his colleagues in the Ten Forward lounge. Deanna Troi has turned into a cake with a human head. It is, specifically, a cellular peptide cake with mint frosting. Work thoroughly enjoys eating her. Holographic Sigmund Freud interprets the dream as Data struggling with sexual dysfunction (contra Yar).
So there's a lot to unpack in the episode. But it makes for a straightforward and amusing cosplay. The host of the Trek Profiles Podcast snapped this photo of two cosplayers on the Star Trek cruise currently underway.
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