The most important thing to remember, if you wear head protection, is to make sure it is comfortable - otherwise it will cause unwanted pain and injury. (qaeducation.co.uk)
A puppy's teeth are «needle» sharp and this can cause a lot of unwanted pain. (ipupster.com)
Yet many women who experience unwanted pain during during intercourse are under the impression it's just a reality of sex. (health.com)