The listening booth scene in BEFORE SUNRISE (1995) is basically two people trying not to acknowledge how intensely attracted they are to each other.
The silence, the glances, the tiny smiles. The tension is doing all the talking.
We think we want sex, it's not always about sex. it's the intimacy we want. To be touched, looked at, admired, smiled at, laugh with someone, feel safe. Feel like someone's really got you. that's what we crave.