[Tegan and Sara's "So Jealous" plays over various scenes of the Santa Monica Pier in L.A.] I want the ocean right now I want the ocean right now

Welcome back. Tonight, we are talking about the connection between love and the senses. Your lover... kisses you and... you feel a tremor in the back of your knees.

The synapses fire, sending orders: "Move your legs, move your arms."

"She's the one for you. She's the... girl of your dreams. She's your... one and only..." And you know, because... the smell of her makes your head swim, because... you get a physical jolt every time...

... she sends a glance your way. I mean, she touches you here...

[touches herself on the neck.]

and you feel it... here.

[puts a hand between legs.]

You touch her anywhere, and you feel it everywhere. And then... boom! It's six months later.

And she's touching someone else.

And you might say...

"Hey, A... relationships end, lovers leave, leaving labyrinth of heartache and betrayal."