Is it immoral to deceive someone?
Depends on the deception really. Only if it results in real harm, basically.
Well, then in this case. If one person promises another that they will only have sex with them, and then has sex with someone else, then they at least know that their action will potentially cause great harm. So would that be immoral?
Or... looking at it another way... Think of it as a contract. If you tell someone that you'll forfeit the right to have sex outside of a relationship, and in exchange they'll do the same, then isn't that harmful? You've made them sacrifice something they may have enjoyed doing for nothing.
Why is smoking weed immoral from a Christian perspective? Is that something actually grounded in what you think god wants, or is it just something the community feels is wrong? Not challenging your beliefs, just honestly curious why, assuming Christianity was true, that would preclude smoking marijuana.
That is why I put it in my gray area section. Smoking is never explicitly mentioned in the bible, but generally speaking it would fall under this verse:
"If anyone destroys God's temple, God will destroy him. For God's temple is holy, and you are that temple."
Just like tobacco smoke, cannabis can have many adverse effects on your health, and therefore would be considered as treating your own body poorly, which is a sin.
Yeah, but the bible is definitely very pro-wine (not like in excess but it definitely endorses drinking at least on occasion). So, I feel like if wine would be ok, weed should be too.