They might not no how to use the equipment
Female a male and a friend
B. Talk to a trusted adult!
They have more experience and would know what to do before things got out of hand!
(Edit): Forgive me, I did not see the part where it said to choose three
You can get an X-Ray, see a chiropractor, etc.
The reason why ethics differs when we're talking about people, companies, nations is that all of these have interests which may differ. What happens then with differing interests is that it also lead to different moral and value systems which again in turn lead to different ethics. Most usually, the actual source why ethics differ is either due to the interests or wishes of a particular social group mentioned here.