mmm. Heavy metal poisoning? (Selenium, plutonium, mercury, etc.) In addition to having a metallic taste in your mouth, are your teeth and hair falling out?
On the other hand a good friend was having a metallic taste in his mouth an it turned out that a particular brand of soda that he was drinking was the cause.
In sum, a metallic taste can be a very serious symptom, or nothing at all. Get thee to a doc if it persists.
after reviewing the above I am now thinking that it might be this wisdom tooth I have that is decaying. I’ve been putting off having it fixed for a long time because… well… that involves having my wisdom teeth removed and I hear thats not fun. I wonder if THAT is the culprit.
They don’t still use copper coils in IUD’s do they?
Hehe… some girls do. Reminds me of this chick we used to call “Copper-Bottoms”. 
Thank G-d I wasn’t the only one who thought it said “penises” at first (12) glance(s). 
Sorry Whammo… don’t know what to tell you.
When I drink Sprite I get that taste sometimes…try Listerine 
If that doesn’t work, I advise oral sex…then you can tell her that she tastes like pennies (or penis, if you prefer) and blame your horrible breath on her.
–==the sax man==–