Do you know I've had any coffee or tea?
Wow, really? Why haven't you ever had coffee or tea?
I think it makes people too jittery and I don't want to be like that.
I can see how some people's reaction to stimulants might make you wary, but not trying coffee or tea holds you back from learning from your own experience. Branch out and try a cup of joe or a spot of tea.
I don't know, I don't think it will be good for me.
You should open to new things and give it a try. You never know when you'll find something new that you enjoy!