Having said that (and having it on my web page for quite some time), I received the following e-mail from someone who seemed to know what he was talking about:
dude please stop using ANY fuel that burns with out a wick or in liquid form. This will only cause you great pain, the reason for parafin or a profesional liquid medium like 'XXXXX' (name deleted - see below) is that it will not burn on your face if the flame gets too close and will not ignite liquid on chin etc. I find the fact that you even mention using alcohol or other highly flamable liquids on your site and dangerous thing as it gives people the idea of using the wrong fuel when they otherwise might not have thought about it or taking yours as a difinitive answer to the question 'what to use'.
Well, maybe that isn't the 'difinitive answer' either, as I later received the following e-mail:
While surfing the internet today I came across your page dedicated to Fire Breathing hints. There is a section on the page which describes an email you received from someone suggesting "XXXXX" to be a fuel used for professional fire breathing. We are a company named Juggleart in Melbourne who produce this fuel for sale to performers who manipulate fire. We do NOT recommend that people use it for Fire breathing. We do NOT recommend people fire breathe at all. Would it be possible to remove the words "XXXXX" from your page? We would much appreciate it.