You’ve come to Guyspeak for what R. Kelly calls’ Real Talk’, and so I’m not going to waste your time talking about “ooh this guy is a criminal and a total disaster.” Chances are he’s not; he’s probably a college-age dude, and he and his buddies want to raise the ante on their partying. They’ve already drank past the point of pooping in their sleep, they’ve already smoked enough weed to memorize the entire Bob Marley Legend Album and now they want to fry some bigger brain cells. Naughty naughty, but I get it; we all went to The University of Massachusetts, Amherst in some way or another.
And even though I am responding to this question during National Charlie Sheen Appreciation week, I am going to concur with your sentiment: it’s a dumb idea. But, it’s not your place to pull his nose off the glass coffee table; that, ultimately his choice. It is your place to express how you feel about it and be vocal about it. You guys are a couple; you care about him. It doesn’t make you Laura Lame girl, Patty the Party Pooper or The Town Drug Czar to say dude, don’t do coke, it’s dangerous, illegal and lame.
I think you need to figure out what your real issue with this is and communicate it accordingly, Are you worried that his upcoming coke try-out will be the inevitable launching point into a Lindsay Lohan spiral of doom? Are you worried that he’ll have an immediate psychotic break and show up to your parents house wearing a Where’s Waldo costume drenched in hooker’s blood? Or, are you worried that by your expressing disapproval he will drop you as a square nerdling?
It could be all of these or none. But once you identify your concern, it’s time to buck up and draw your line in the sand. Tell him what feels right. And that said, if he chooses to snort your line in the sand or a mound of cocaine, at least you’ve done your part.