Terri is an experienced matchmaker. She tells her clients who are looking for romantic

misattribution of arousal

Explanation:

Terri is relying on the psychological concept known as misattribution of arousal.

Misattribution of arousal in psychology is the concept used to describe the situation whereby individuals can be aroused by sources other than what was supposed to cause the arousal, it is when individuals wrongly attribute the stimulus that is responsible for their physiological arousal.

Terri's client may not have been aroused by the first date but by the expectation that a first date should result in physiological arousal.