Nail on the head Miscvoyeur.
For me it's the interaction.. the slow burn.. how the couples react to each other, the gentle caresses, the eye contact, how the couples treat each other, kindness, playfulness, how they laugh and play.
Intrigues me, human interaction.
the intimacy is a bonus at the end of their courtship, but voyeurism isn't about watching people fuck....there are plenty of websites that cater for that....it's about watching interaction between couples.. watching how they gel with each other, their conversations and the way they live and love.