Neutral because you don't do anything bad but go somewhere with your friend.
it may be a medical problem but you yourself said you have poor eating habits and the can 100% cause weight gain. A burger fry and a drink is about your supposed daily intake. Eat right see if it help's otherwise go into a family/general/internist doc and get some test done.
True - abstaining from tobacco and drug use is an important part of
maintaining good physical health. This is of course a guideline to be
considered alongside the importance of exercise and a healthy diet to
achieve a fully rounded healthy lifestyle.
The answer is immunizations. I had this question before.