Harry Styles would make a good Jewish mother ... because the "One Direction" singer thinks everyone should be well fed -- even us.
Harry -- sans Kendall Jenner -- was carrying a doggie bag as he left Swingers in L.A. after a late-night dinner ... when our photog spotted him.
Harry didn't talk, but he seemed concerned our guy Kris was undernourished ... so he offered Kris his greasy leftovers.
Fun Fact: This is the same photog who once rooted around for Johnny Depp's used cigarette butt.
We're sending Kris to a bar ... he'll find something to wash down the half-eaten patty melt.
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