Why did my teacher do this, was he checking me out?

Was my teacher checking me out? A couple of times when I’ve walked by him in the hallway and he says hi, I’m looking right at his face and his eyes sort of give me the once over, like they flicker up and down, once or twice this happened when he was standing waiting to go into a classroom with a whole bunch of year 7s lined up in front of him! Which is quite shameless.

Also happens sometimes when I walk into the classroom, I get the usual good morning and smile, and his eyes flicker down for literally a split second. I wouldn’t have even noticed if I hadn’t been studying his face intently, he wasn’t staring or anything. He isn’t a creepy pervert, he is a perfectly appropriately behaved kind gentleman, apart from this one thing I have noticed him doing.

Is he checking me out, or just looking at what I’m wearing in a totally innocent way, like when someone you know wears something different to what they usually wear you just want to see what it is. I don’t know what to think really. He is a really lovely teacher.