One thing I learned from the recently departed Dr. Ruth (RIP) was that having sex underwater has the potential to be dangerous because of water in the cavity meaning more pressure. IDK if she's correct, but it makes sense to me.
I actually rented the video when this was first released and all scenes are good, but this is the best. The underwater scenes with cocks lazily floating and bobbing about are outstanding as is the bottom. A super posting. Thanks.