Did you just pick your nose? Yes, or yes?

This is an example of what the Professor is using to educate our children, in true German tradition. I laughed until my sides hurt and tears streamed down my face when I watched this. I hope you have a similar reaction.

You only need to know one term. Popeln: to pick your nose (gepopelt is the past participle of popeln). The rest, I think is fairly self-explanatory.