It takes him a surprising amount of courage to muster up the nerve to call Ned, but he does, and as soon as Ned answers the phone, he's talking, barely giving Ned the chance to get a word in edgewise. Better to just say everything that comes to mind, before Ned has the chance to cut him off or to turn down his invitation.

"Hi, Ned, it's me. Ginsberg, I mean. I mean, you probably could have guessed it was me, but just in case you didn't, it is. Anyway, I was just wondering, um, one of my coworkers is having a Halloween party, and I don't normally go to parties, but I got invited to this one, and I figured if I was going to go I should go with someone who'd be fun to go with, and who might get along with my other coworkers, so, uh... you wanna go?"

Needless to say, he doesn't go to parties much. And he certainly doesn't ask people to go to parties with him much. It's all said in one breathless litany, as though he's afraid Ned will interrupt him and harshly reject him.