It is well-known that many rabbis encouraged sex as a way to celebrate Sabbath. It is also well-known that these rabbis preferred to use euphemisms for sex. What is new to me is that the phrase "eating garlic on Sabbath eve" was a popular euphemism to refer to Friday night coitus (m. Ned. 8:6; y. Meg. 4:1 [75a]; b. B.Q. 82a). It seems that some of these joyous Sabbath keepers came to be known as “garlic eaters” (m. Ned. 3:10; t. Ned. 2:4).
Ah the good ole days, when sex and garlic joined forces to keep the Sabbath holy!