Your mind is right on cue, quickly imagining the two of you checking into the nearest hotel and getting down to it. But wait So, when does fantasizing about someone else become unhealthy? And what—if anything—can you do about this little conundrum? To answer those questions and more, we consulted clinical psychologist and sex therapist Dr. Christopher Ryan Jones. Meet the Expert Dr. Christopher Ryan Jones is a clinical psychologist and sex therapist. But before you spiral into a whirlwind of self-doubt and misplaced guilt, take a second to realize that fantasizing about people is not the catastrophic life event you may be picturing.