lol, so the poor guy really was just doing a "WTF is THAT and WTF would you put it on the end of a chain and wear it to lunch" when he suddenly realised that the wearee was looking at him looking and that there was bare skin above it and from certain points of view it could possibly be mis-construed that he was looking at something else.
The first camera angle clearly show that he was looking at cold hard metal baubles and virtually oblivious to the presence (or lack thereof) of fleshy ones hiding behind the metal ones. In particular, he appears to be trying to work out what the design/image is on the pink or white ribboned brooch thingo on her upper left.
The second camera angle supports the same assessment and it is only his look to the ceiling that creates a false impression that he was trying to look at tits rather than jewellry.
I guess there was some sort of address going on (prolly why near everyone is looking the same way and not talking) which is why he couldn't just do the "excuse me, but WTF is that hanging around your neck ?" thang.
regarDS