He stayed for the whole show, and was on the floor, which is to say he was just feet away, kind of appraising,” Eisenberg said of Mark Zuckerberg’s appearance on SNL. “And it was wonderful, I would look over to him and he’d smile.” The two met for the first time on the set at Studio 8H, and hung out together briefly at the afterparty. “As strange as it was, it was kind of the best possible way for that to happen,” Mr. Eisenberg said.

I have exactly twenty-five kinds of handwritings, the best (i.e., those I use the most readily) being as follows: a round diminutive one with a pleasant plumpness about its curves, so that every word looks like a newly baked fancy-cake; then a fast cursive, sharp and nasty, the scribble of a hunchback in a hurry, with no dearth of abbreviations; then a suicide’s hand, every letter a noose, every comma a trigger; then the one I prize most: big, legible, firm and absolutely impersonal; thus might write the abstract hand in its superhuman cuff, which one finds figured on signposts and in textbooks of physics. It was in such a hand that I began writing the book now offered to the reader; soon, however, my pen ran amok: this book is written in all my twenty-five hands mixed together, so that the typesetter or some typist, unknown to me, or again the definite person I have elected, that Russian author to whom my manuscript will be forwarded when the time comes, might think that several people participated in the writing of my book; and it is also extremely probable that same rat-faced, sly little expert will discover in its cacographic orgy a sure sign of psychic abnormality. So much the better.

I’ve never had tastes of people my own age. All of my friends when I was 15 were in their 40s. I’m not actually mature, just very self-conscious around people my own age because I feel like I’m supposed to act the same way they act and I don’t know how.