An AIDS research doctor (who had just f'd me - with a condom, thank you) once gave me the rules:
1. Don't suck cock for at least 4 hours after brushing and/or flossing.
2. Don't floss or brush for 4 hours after sucking cock.
3. Keep your teeth and gums in best possible condition - don't suck cock if you've got any bleeding in the gums or sores in any part of your mouth.
4. Don't swallow.
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