Can a lack of flossing cause super bad breath?

My friend has bad breath so bad it stinks up an entire room. He brushes regularly but never flosses. Could this be the reason? He went to the dentist, has no decay, no cavities, yet his mouth smells like a sewer. ????????

Zips play strong, but lack of consistency shows

Zips play strong, but lack of consistency shows
Zips play strong, but lack of consistency shows

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