Well, that definitely got a reaction, and Near's metaphorical panties were definitely metaphorically bunched.

"What?" he sputtered. "That isn't-- I'm not-- I don't care whether you're wearing clothes or not," Near huffed, and then immediately realized it was the wrong thing to say. He took a deep breath, calming a little. "What I mean is that you can wear whatever you like and it won't affect my temprament any."

It was mostly true, anyway; while Near had certainly found Mello interesting to look at, it didn't mean he was going to allow that to interfere with his calmness. And anyway, Mello clearly held a disproportionate opinion of himself... "spectacle", indeed. He was just... interesting. That was all.