One shoulder blade may appear more prominent than the other due to rotation.
Most of the communication comes through pressure on the clasped hands and on the shoulder blade.
The lead's left hand is holding the follow's right out to the side with their right at the follow's opposite shoulder blade.
The man's other hand goes beneath his partner's shoulder blade.
If you're looking for a spot that can be masculine or feminine, seductive or sensational, yet can still be covered up when you don't feel like sharing then consider the shoulder blade.