But teacher, my brain is my self defence.

[There's a small smile on his face when he comes out.]

And my size makes me perfectly able to do a great amount of sneaking around, you see?

[How troublesome bullies might seem to be and how painful beatings could be, Loki knew he was smarter than them. And maybe also wiser.]

I have been able to kick Cato's shins a couple of times...before he stuffs me into a locker, that is. That is quite self-defensive of me, I think.