In my opinion commercials tend to be silly/funny or dramatic/captures human emotion to appeal to the public.
Because the executives of the companies that want their products advertised on the tv think that the viewing public are stupid and will buy anything. As long as the advert is funny or sexual the execs think that the public will rush out and buy their products.
Not this little black duck.
To appeal to the audience's sense of humor.
They try to get your attention and make you buy theyre stuff. It kinda sounds dumb, but it works
When people sense humour, they will find that is interesting. I think.