Three of those things are illegal, one is 'immoral', as you've stated the degree is different, and to me that changes a lot with regards to my actions.
If Kevin kills someone with the gun do you blame the gun or Kevin?
If Barry steals the candy do you blame the candy?
If Jeremy sells weed do you blame the weed or blame Jeremy?
If Tony wants to cheat on his wife would I blame you?
Think about it this way, if my girlfriend wanted to cheat there's nothing I could do to stop her aside from maintaining my own faithfulness and reaffirming that if she does the relationship is over. You want to be in a faithful committed relationship? Find someone faithful. If she cheats then I need to reassess how I choose my girlfriends, if I cheat I'm an asshole.
All four of the things are immoral, with the possible exception of the weed sale depending on the context. The legality is irrelevant, as this is a discussion of morals alone.
Your twist on the analogy is meaningless, unless you're describing the unmarried person in an adulterous triste as a tool with no free will. Which seems like a mind-bogglingly absurd position to take.
You last comment has nothing to do with what we're talking about. We're talking about the culpability of the person
not in the relationship.
I totally see from where you are coming from, but this analogy is also wrong. The cookies weren't out there seeking someone to eat them you know?
But hey that's you, and if that's what you believe in then great, it's none of my business, I just don't like people who go out and point fingers (not talking about you).
Ah also in the "seducing" setting I meant that both are equally responsible if it's not clear.
No. The cookies were the sex in the analogy. I was the cheater, you were the cheatee, and my wife was the person with whom I was cheating. The analogy is fine, I'm sorry it wasn't clear enough for you.
Regarding your last sentence, I am very confused. Can you explain how responsibility is shared if the unmarried person seeks the relationship, but not if the married one does?