Personal space?

So I was perched in Sin, as I often am, when my phone beeped and I looked down to check the message I had just received. When I looked up again, this was the view that I was confronted with...

Initially, I was somewhat annoyed that they were basically invading my personal space with their sexual antics (I can't say for sure, but I don't think this was a sexy show for Sin's patrons to enjoy), but then I was just impressed at how quickly and stealthily they had managed to get down to business.