One sign that someone's been possessed, cloned, body-swapped etc. is when they start behaving in a strange way romantically. This typically means they're far more sexual than usual. Cue Fan Service. Another variation that crops up when evil clones or evil body doubles appears is that the copy is generally a really bad kisser, giving a clue to their true identity. See also Showing Off the New Body. Compare Good People Have Good Sex (because being more sexually adventurous than normal is a sign of villainy). Examples of Not Right in the Bed include: