They are male, because they hold everything in, but you can see right through them.
PHOTOCOPIERS:
These are female, because once turned off; it takes a while to warm them up again. They are an effective reproductive device if the right buttons are pushed, but can also wreak havoc if you push the wrong Buttons.
TIRES:
Tires are male, because they go bald easily and are often over inflated
HOT AIR BALLOONS:
Also a male object, because to get them to go anywhere, you have to light a fire under their butt.
SPONGES:
These are female, because they are soft, squeezable and retain water.
WEB PAGES:
Female, because they're constantly being looked at and frequently getting hit on.
TRAINS:
Definitely male, because they always use the same old lines for picking up people..
EGG TIMERS:
Egg timers are female because, over time, all the weight shifts to the bottom.
HAMMERS:
Male, because in the last 5000 years, they've hardly changed at all, and are occasionally handy to have around.
THE REMOTECONTROL:
Female. Ha! You probably thought it would-be male, but consider this: It easily gives a man pleasure, he'd be lost without it, and while he doesn't always know which buttons to push, he just keeps trying