The family thing is great, when they act accordingly to what he wants. Sure, there are some hiccups, but it evens out... That aside, a bowtie wasn't what he was expecting. He just- looks at Hisoka, nonplussed, as he messes with the bowtie. Illumi could certainly get away in a dress if the situation required it, but for this one-

"No, I'm getting the tie." Plus he'd have to wear the appropriate shoes, which isn't appealing. A glance down at the tie instead, now that it's right up close. "It's a little memorable. You know that's not the point."

Still, he looks back up at Hisoka and tilts his head slightly, waiting for some actual appraisal. Maybe there's a secret to gold ties he doesn't know, like the secret to crop tops...