lingering hand-clasp
The tearfully-touching gesture that often occurs when a pair of hand-holders hafta take off in opposite directions but are reluctant to let go of each other's hand; it involves the couple's slowly walking away from each other but still retaining their finger-clasps until their arms are fully extended between them. Several extra points if you considerately take the time to gradually/gently slide your fingers free of your friend's in a slow affectionately-caressing movement.
Tiffany and I always make sure to perform the lingering hand-clasp whenever we hafta part company after a delightful beach stroll or dinner-date; it helps keep us happier and miss each other a bit less until we are able to canoodle again the next time.