(I know this from experience)
Dad: Don't worry about it, there's plenty more fish in the sea.
Mikey: Yeah 52% of the world is ladies.
Dad: Well son, now that you've tasted the "forbidden fruit" you'll be chasing your cock for the rest of your life.
2. Hot chick who never seems to go out with anyone.
3. A female that you know you can't become involved with past the point of friendship. This may be due to having a boyfriend/not being interested in you/or too busy to be involved with anyone. She's like the real forbidden fruit. You can't have a taste of her.
Effectively a prolapse of the testicles.
Gay Guy: Please don't say anything...Well, I tasted her forbidden fruit last night and now I feel strange. I thought I was gay but now, I have no clue.
Emma: But he hardly ever has sex with anyone!
Sarah: I know, he's a real forbidden fruit