Hugh Grant knows ... it's rude to interrupt someone during a meal ... so he did his best not to bother this suckling baby during a photo with a fan.
The pic was shot this weekend at the Castle Inn pub in Dover, England -- which features "Pudding Day" on Wednesdays and Thursdays.
We're told the woman in the pic is the pub owner's wife -- who clearly had no problems whipping out her baby feeders inside the establishment.
Boobs -- it's what's for dinner.
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