With all due respect, Mistress, I would argue that a more pressing warning might be that lighters and genitals don't mix. That's a mere assumption, mind you -- I can't say I speak from experience.

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1992 300D 2.5T
1980 Euro 300D (sadly, sold)
1998 Jetta TDI, 132K "Rudy"
1974 Triumph TR6
1999 Saab 9-5 wagon (wife's)