Ah, the dental dam - perhaps the world's most misunderstood prophylactic. The attitude towards these mythical sheets of latex seems to be: No one actually uses them. But, if you're looking to perform oral without actually exchanging bodily fluids... this would be something to consider. When it comes to HPV, which is not spread through the exchange of bodily fluids, unfortunately a sheet of latex just won't help.

FYI: They come in flavored varieties.