I recently went to Thalai Cauvery along with my parents. We stayed at Madikeri which happens to be a honeymoon spot. And this is what I observed 
A couple is a honeymoon couple if
1. The girl cannot walk without the help of her guy, even if the road is as smooth as a formula 1 track (Vice Versa)
2. A guy is seen smiling, when his wife is shopping
3. A girl will admire at her guys intelligence, even if he says 1+2=3 
4. Couple who order more in the restaurant, but eat very less
5. While travelling in a bus,train or flight the girls head automatically gets stuck to the guys shoulder.
6. Pose for photographs, lightly hugging each other. And the guy kinda hugs his wife, like holding a fragile object
Please add more to the list from your experiences 
