QX Magazine reports that the Heath and Hampstead Society and the Corporation of London have recently expressed concerns about the cruising and public sex on Hampstead Heath. [In this weather??] The society's chairman, Martin Humphrey, says: "discarded sexual paraphernalia, such as used condoms, are both unpleasant and a health risk."
This reminds me of a letter I once read a couple of years ago in local newspaper the Ham and High, complaining about the condoms and "tissues covered in blood, semen, excrement and worse".
I've been puzzling over this for years, but I still have no idea what the "worse" could possibly be.