Magnus's primary association with bachelor(ette) parties is a bunch of drunk assholes being loud as they walk past the bench he's trying to sleep on and maybe specifically antagonizing him in the process. When he started reflecting on ideas, his main one was 'not that.'

"I mean, it depends on if Alex can be there," Magnus says. It's Galahad's day, he's not gonna go around trying to rig the guest list. "Because if so, I was gonna ask him to do all the animals in your bestiality so we could draw them all. And if not, I was just gonna ask all the animals I can if they'd be willing to come by for a little while. I was thinking we could do it in the tower, too, so we could, like, pick constellations here if drawing got old? And of course there should be a blind soda tasting, where you rank them before you even know what ones they are." Drinking is a feature of bachelorette parties, right? But neither of them are really into booze, so soda just makes sense.