Abortion is a difficult topic for me.
On one hand I support it because it kills children.
On the other hand, it gives women a choice.
Abortion is a difficult topic for me.
On one hand I support it because it kills children.
On the other hand, it gives women a choice.
Okay, so you're a little slow, huh? This joke pretends to be a serious, balanced take on a controversial issue. The first part, "On one hand, I support it because it kills children," is dark humor because it's a shocking, anti-humanitarian reason. It completely subverts the expectation that the speaker will offer a socially acceptable reason, like a pro-choice argument. Then, it follows up with a standard pro-choice argument, making the contrast even funnier (or more offensive, depending on your sense of humor).