"Double action" guns are much more common than single action - most semi-auto pistols are double-action, at least for the first shot.

That means that pulling back the slide on your semiauto pistol only chambers the round - it doesn't "cock back" the striker pin. Only when the trigger is pulled beyond "first stage" (halfway back) does the hammer/striker become cocked.

After that first shot, all other shots from the gun (until it is decocked, safety is activated, or you cycle through the rest of your ammo) are "single action," since the blowback from the previous shot provides the force to re-cock the weapon.

Referring to women who are sexually or romantically attracted to other women. Applies to both lesbians and bisexual women, as it is only the same-sex attraction that matters, not any other attractions the women may have.

Originates from the Greek poet Sappho, a bisexual woman from the Isle of Lesbos, from which we get the term lesbian.

While masturbating, a finger is inserted in one's anus.