After walking thru Backwell Lake at 12 last night i can confirm the dogging scene in Outer Nailsea is alive and kicking. Not that i was piking or anything.
You can also deduce from that the Marines do tolerate dogging, presumably as long as you're not on duty at the time (although I would imagine dogging sites in Afghanistan are a bit rarer than they seem to be in North Somerset).
This is perhaps the sort of thing lacking from modern day careers advice.