A lot of non-living objects are actually either male or female.  Here are some examples:

Freezer Bags: MALE -- They hold everything in, but you can see right through them. 

Photocopiers: FEMALE -- 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: MALE -- They go bald easily and are often over inflated.

Sponges: FEMALE -- They are soft, squeezable and retain water.

Hot Air Balloons: MALE -- To get them to go any where, you have to light a fire under their butts. 

Web pages:  FEMALE -- They're constantly being looked at and frequently getting hit on.

Trains:  MALE -- They always use the same old lines for picking up people. 

Egg Timers:  FEMALE -- Over time, all the weight shifts to the bottom. 

Hammers:  MALE -- In the last 5000 years, they've hardly changed at all, and are occasionally handy to have around. 

The Remote Control: 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.