A proverb about it's a sin not to take what's you catch


I may have dreamed this but I remember my Japanese teacher telling our class
(23yr ago) about a Japanese proverb that went something like:

> It's sin not to take the fish you catch

The teacher explained this to mean, men use this proverb to justify cheating.
That it means, if a woman offers herself it's a sin not to accept.

What is this proverb?




The closest phrase in Japanese would be
[据え膳食わぬは男の恥](https://jisho.org/word/%E6%8D%AE%E3%81%88%E8%86%B3%E9%A3%9F%E3%82%8F%E3%81%AC%E3%81%AF%E7%94%B7%E3%81%AE%E6%81%A5),
but it says nothing about fish. The literal meaning of this phrase is "Not
eating the meal set before him is a man's shame".




The closest phrase in Japanese would be
[据え膳食わぬは男の恥](https://jisho.org/word/%E6%8D%AE%E3%81%88%E8%86%B3%E9%A3%9F%E3%82%8F%E3%81%AC%E3%81%AF%E7%94%B7%E3%81%AE%E6%81%A5),
but it says nothing about fish. The literal meaning of this phrase is "Not
eating the meal set before him is a man's shame".

