That was the punchline. Of course, this is because of the inherent difference between men and women which, militant anti-male feminist lesbians aside, everyone knows to exist. That's the end of the bit and the part where you laugh. Let's try some observational humour. Uh, shower curtains don't always catch the water, the other supermarket line is usually longer, women always go to the restroom together, and men don't like to read instruction manuals.
Wacky time is over.
I'm not even going to do my Captain Kirk impression for you. In fact, I don't want you to read this paper any more. Go put it back in the box. And fold it carefully. These things cost money.