depends what you're pulling, lol.
If you are worried you should consult a qualified medical practitioner (a doctor).
It would depend on the context in which it is used but I would assume it means to have sex. With a hand gernade once you have "pulled the pin" you are commited to the act.
sex!
Friends who have sex.
it came from the heart
when a substance can be pulled out and drawn into a line
Stretched or pulled out
dog sex
may be no desire for sex
sex
pulled muscles, pulled and torn ligaments, cuts bruises it depends what you mean by 'injuries' i mean you could end up getting hit by a car!
The chances are great.