Most women stimulate the right or left side rather than the glans during masturbation.
In William Shakespeare 's Othello Act 1, Scene 1the missionary position was euphemistically called "the beast with two backs".
These feelings can also distract people from sexual intimacy.
And the missionary position is exactly that kind of exercise, at least if the activity lasts more than a few fleeting moments.
Description: Promoting Healthy Behaviour: Things Fall Apart.