The plugin is wonderful and a must-load for every scene in my opinion. Happy to see many updates of the plugin! Yet I have two suggestions for additions/updates.
1. Are you able to tighten lower lip near the corners to wholly connect to the bottom of the penis? I guess it would be more difficult for lips to connect with tongue collisions, but I often use the plugin without them and try to manually pose the lips to make it seem tight and without space in-between.
2. For nipple suck - are you able to make it seem like the nipple is being sucked and breast pulled, e.g. by automatically connecting the nipple bone to the mouth/tongue during the sucking process?
The nipple suck can be improved for the person sucking, but making that sync the persons nipple via some of morph or you sugget attach the bones, that's a lot of extra work - maybe....