Is it Male or Female?

Swiss army knife: Male
Even though it appears useful for a wide
variety of work, it spends most of its time
opening bottles.

Kidneys:Female
They always go to the bathroom in pairs.

Tire:Male
It goes bald and is often over-inflated.

Hot air balloon: Male
To get it to go anywhere, you have to light a
fire under it . . . And, of course it’s full of hot
air.

Sponges:Female
They are soft and squeezable and retain
water.

Web page: Female
It’s always getting hit on.

Shoe:Male
It’s usually unpolished, with its tongue
hanging out.

Copier: Female
Once turned off, it takes a while to warm up.
It’s an effective reproductive device when
the right buttons are pressed, and it can
wreak havoc when the wrong buttons are
pressed.

Ziploc bags: Male
They hold everything in, but you can always
see straight through them.

Subway: Male
It uses the same old lines to pick people up.

Hammer: Male
It hasn't evolved much over the last 5,000
years, but it's handy to have around.

Remote control: Female
It gives men pleasure; he'd be lost without it,
and while he doesn't always know the right
buttons to press, he keeps trying.