Bad eating habits, less self-confidence
A short term goal would be to abstain from sex or masturbation for a health reason: waiting for a UTI, STD or other issue (from a procedure, perhaps) until healing comes.A long term goal would be waiting for marriage to have sex and then committing to only have sex with that person.
B. Tooth Decay - because of the acid from your stomach rests on your teeth.
When we are little we see the way our parents or elders act and that tells our brain that is the correct way to act. As we grow up the things they tell us we will become is what we think will happen and so we do that in fear that we will disappoint them.
Our immune systems have improved over the years due to improvements in the medical fields. I also believe your brain has a bigger effect on how sick you actually allow yourself to become