Answer:
What has a head and a tail but no body?
You speak this when you are being sincere.
I run cold and hot, I look blue but am red. What am I?
You roll it or you buy it, People say you shouldn't try it, Because you may get a stroke, From inhaling all that smoke.
When a doctor hits you with a hammer he is testing this
People take me on walks and I run and have fun. What am I?