The compulsive urge to "change the subject" even if a conversation, or activity, hits a critical point. At the same time, can also mean "can't talk seriously". Females are more vulnerable to this disorder than any other beings, because of them being more talkative, having a shorter attention span in many occasions, or both. Such a disorder is quite serious, since it also kills the mood for almost any situation.
Guy: "I love you babes."
Girl: "I lo... OMG is that a sale over there?! Let's go!!!"
Guy: "... Honey, we need to get you to a doctor for CTS..."
Guy1: "Dude that babes is HOT!! I bet banging her would be so awesome!!!"
Guy2: "I don't know dude. She looks like she's got CTS."