Temperature segregating food on a plate makes sense, because some of the cold food will go weird (wilt etc) if it warms up too much. Not worry about it in mixed food like a burger is also fine because they're designed to work together. So not weird at all ;P
The concentrating tongue thing is cute XD and definitely much friendlier than the death glare I apparently give things when I'm really concentrating.
I'd not want to experience your death glare...well, maybe just once as I like to know stuff...but then, nah, feel free to glare in other directions. And yep, the concentration-tongue...I've been told it's cute, but also picked on it as well...I don't care though, it's not like I can stop doing it.