Hi! Was reading your entry on the US election (from a link in Teresa Neilsen Hayden's Making Light), then browsed down to see what was what, and my eye was caught by this entry (I'm a heterosexual male; draw your own stereotype here). I'm not going to mock you by answering your questions*, I just wanted to mention something I saw or read somewhere recently, forget where, that is either so obvious it makes you wonder why you never thought of it, or there's something wrong with it.

If you can't find dental dams, buy some condoms and cut them open to make a flat rubber rectangle. Voila, dental dam! A bit Blue Peter, perhaps....