My parents have always told me that drugs are bad, and doing drugs goes against the rules of my church.
We could go get some ice cream instead if you want. I'll pay for it.
I'm sorry, I don't want to do drugs.
I was always taught that drugs are bad and can lead to many problems. I don't want to have to deal with those problems later in my life.
I understand why you don't want to do drugs. I've been taught about drugs too and I now understand that the high you get is not worth some of the problems that come with drugs. I could get cancer, the drugs could mess with my brain, and I could easily get addicted to them.