1) Ziploc Bags are Male, because they hold everything in, but you can see
     right through them.
2) Copiers are Female, because once turned off; it takes a while to warm
    them up again. It's an effective reproductive device if the right buttons
    are pushed, but can wreak havoc if the wrong buttons are pushed.
3) A Tire is Male, because it goes bald and it's often over-inflated.
4) A Hot Air Balloon is Male, because, to get it to go anywhere, you have to
    light a fire under it, and of course, there's the hot air part.
5) Sponges are Female, because they're soft, squeezable and retain water.
6) A Web Page is Female, because it's always getting hit on.
7) A Subway is Male, because it uses the same old lines to pick people
    up.
8) An Hourglass is Female, because over time, the weight shifts to the
    bottom.
9) A Hammer is Male, because it hasn't changed much over the last 5,000
    years, but it's handy to have around.
10) A Remote Control is Female. Ha! You thought it'd be male , didn't
    you?

But consider this - it gives a man pleasure, he'd be lost without it, and while he doesn't always know the right buttons to push, he keeps trying!