For a bit of background, we are in our late twenties, married for a year (together for 3), and do not use drugs recreationally. He was a major stoner in his early twenties and has never tried anything else. He is a very paranoid person and has night terrors several times a week (and a whole lot of sleep talking) which I suspect could have been aggravated more by smoking weed all day for years. 

He has approached me telling me he wants to try mushrooms for weeks now to apparently improve himself (anecdotal evidence supposedly) and even slipped out he might do LSD this weekend. He can't explain where he has found this new motivation for taking drugs but I am 100% against it. 

I have flat out told him no, he can't take them, and I worry that anything new he might have might affect him poorly as he can't predict what's going to happen. I don't want him to think I am open minded in allowing him to try one drug just for him to eventually downward spiral into trying a whole lot of other drugs.

I feel like there's no room to compromise on the topic of drugs if the other half says no. He subsequently threw back at me that its the same situation where I want to have weight loss surgery done because he's not fully comfortable with that either... I don't think they're comparable.

Am I being an asshole? 