Because Christian are suppose to spread the word of the gospel and spread the love Jesus has for us. The devil is a manipulative, tempting creature that spread hatred around the world and tempts human beings into doing sins.
The ACA defines a full-time employee as an individual who works an average of at least 30 hours per week. The mandate for employers to provide health care coverage is in effect and will be fully implemented by 2016.
This is because it is probably apart of your schools dress code. If you feel like this is inappropriate, then you should speak with an administrative officer of your school.