Hair trims are probably one of those things that are easier to do on someone else - he'd trust Kai to do a better job on him than Shinji could for himself.

"It probably looks kind of silly," he's not sure how much he really pulls off the style, a longer cut is probably better left to other guys and gals. With that, he shakes the hair loose once more, adios pony-tail. "If you wanted some help shortening yours up, I could probably do that much in return."

Unless he's looking to let some of that fluff grow out. Kai would probably still look good like that, he thinks.