|any pleasure or enjoyment regarded as illicit, esp sexual indulgence|
Note: “Forbidden fruit” is used commonly to refer to anything that is tempting but potentially dangerous. It is often associated with sexuality.
Unlawful pleasure or enjoyment; illicit love. For example, After Mary moved in with John, Tom began courting herforbidden fruit is sweet, I guess, or Smoking behind the woodshed, that's a case of forbidden fruit. This expression alludes to Adam and Eve's violation of God's commandment not to touch fruit from the tree of knowledge, which resulted in their expulsion from the Garden of Eden (Genesis 3:6). In the form forbidden fruit is sweet it appeared in numerous early English proverb collections.