How do I reduce my bad breath?

I take medicine, could that be it, and how can I stop making it smell bad instead of brushing my teeth all the time.

Brush them in the morning and after every meal and before you go to bed.
Use listerine; that kills bad breath, germs etc.
Chew gum
Carry mints.
And also floss as much as you can.

Does oral sex cause bad breath in women?

My friend told me that my girlfriend has bad breath probably because she had performed oral sex many times in her day. That sounds quite natural, but what does traditional medicine say about that?

WTF?!?!?!
Yes and no … if you don’t brush, or brush after then yeah it can. If you do your usual hygienic stuff, NO.