hit me with affection / misheard lyrics

In that Pat Benatar song, Hit Me With Your Best Shot, the lyrics always sounded to me like "Hit me with affection". It makes sense to me that way, as in showering someone with affection, or simply having a lot of affection for them.

With the actual lyrics, "Hit me with your best shot", I'm not sure I understand what is meant. I guess the singer is saying, go on and try to break my heart; it's not that easy; I might break yours instead? But I guess either way (my version or that one), they are saying they want to have a relationship or entanglement of some kind with the other person.