Some people are the reason why shampoo has instructions

But why though? Is it bad for environment? Does it attract insects? Are you not supposed to bathe in the jungle?

In Germany we have some protected lakes and actually you're not allowed to swim in them. But many people do anyways. And some time I saw someone wash their hair with shampoo in it.... that disrespect

Let me guess, USA ?

I love how english turns any noun into a verb.

This is dumb art direction / client request. Instead start the scene in a beautiful shower, showing a girl pouring shampoo into her hand. The moment she rubs it into her scalp you transition to the jungle, showing that the smell and feel of the shampoo invokes the sense of beautiful nature all around you.

Why advertise it then? Do the advertising companies not know how dumb Americans are?

A hot girl bathing in the jungle? Hmnnnnnnnnnn....

That's not the jungle, it's the Fonts de l'Algar in Spain. I've swum in that pool. Didn't wash my hair though.

Yeah, and they are called lawyers. They just want to cover all the bases to prevent any possible lawsuits. There's not necessarily anyone using shampoo in the forest, but they are not taking that chance of getting blamed or sued for quick money.