Here Captain Rex and Bo-Katan are showing kissing through their helmets.
Although it's obvious that no physical contact is taking place, I feel like this image achieved a small measure of connection between the couple. The image is also intended to serve as a small humorous sidebar to the overall album.
The hand and arm position was carefully considered and was based on both the connection apparent between the couple as well as the limitations imposed by the lack of mobility inherent in their costume armor.