"Well, being blind isn't so bad. You can just feel your way around." And speaking of feeling his way, it seemed that's what Jasper was doing with the drawers. Justin took the opportunity of his friend's distraction to mentally undress him, using memories to supply what was under the costume. Though the costume was pretty hot - he would definitely shag him with it on or off.
"Oh, you're going," he assured distractedly, his mind on a particular scenario that had Justin bent over the counter... "At the very least, dressed all in black, you can blend into the crowd. Plus, you're already dressed - can't have you all dressed with nowhere to go."
He grinned. "Unless you change your mind about my offer, which I know you haven't."