This pun de-lights me

I had to read it twice, but this could be the best pun of all time.

Ahahahaha

I dont understand and I read it at least 5 times. Explain please?

Gotta love science jokes

The boat is a cigarette lighter.

My. Fucking. God......

Understood it on my first try.

I got it, it's a pun, "one cigarette lighter" means the weight, not the boat becoming a lighter.

Cigarette lighter. As in it becomes lighter by one cigarette, being that it loses a cigarette. And and the pun being that it's a cigarette lighter in that it has lost one cigarette but you also light a cigarette via a cigaret lighter.

very punny

3 little women

Christ I fear for this planet.