"Now, now, don't be sad, Chelldon. Shirts are easily mended." Of course he didn't understand that Chelldon might like human interaction, or even additional biological intereactions. He didn't understand lonliness. There were all sorts of humans here, but unless they were staff or scientists or Cave Johnson, it was generally frowned upon for them to fraternize. It built up morale or something truly damaging to the human mind.

Wheatley tried smiling and ushered Chelldon up the stairs and into the elevator once more.

"On a scale of one to infinity plus one, how would you rate your interactions with Walter? One, of course, being 'horrifying' and infinity plus one being 'indescribable even for superior minds like yourself.'"