Choosing to end one's own life for moral, ethical or legal reasons. A person faced with certain death after a horrible accident, crippling debts, impending imprisonment to name a few. Essentially suicide using one's own moral compass instead of desperation or depression as the typical vector of suicide cases.
Having been indicted on over a dozen felonies, Mr. Swartz exercised what power he had over the course of his own life and chose to 'opt out'.
The condition of contracting HIV (Human Immunodeficiency Virus) through heterosexual contact. Often when it's the result of straight extra-marital affairs from either partner in an otherwise monogamous relationship.
"How in the world did Dave get HIV? He's married 8 years now!"
"Remember that trip his wife took to Vegas? 'VaJayJAIDS' from a random fark"