The ESV of Proverbs 5:19 on the YouVersion Bible app contains a footnote on the word “breasts” pointing to Jeremiah 31:14 which reads:
“I will feast the soul of the priests with abundance, and my people shall be satisfied with my goodness, declares the LORD.”
A clear suggestion that breasts are meant to be sources of satisfaction, feasting and abundant delight.
See also Isaiah 66:11 (you will drink deeply from her comforting breasts)