There is a man and a woman who I often see walking together in our neighborhood. When they walk the man has his arm around the woman's waist and the woman has her arm around the man's waist.
If you've ever tried this you know it's not the easiest thing to pull off.
Whenever I see them I never think, "They must really be in love to make the effort to walk like that."
I always think, "I bet they're developmentally disabled."