You might not know this, but a lot of non-living objects are actually male or female.
Here are some examples:
FREEZER BAGS: They are male because they hold everything in, but you can see right through them.
PHOTOCOPIERS: These are female. Once turned off it takes a while to warm them up again. They are an effective for reproduction, provided the right buttons are pushed. It can also wreak havoc if you push the wrong buttons.
TYRES: Tyres are male because they go bald easily and are often over inflated.
HOT AIR BALLOONS: Male - to get them to go anywhere, you have to light a fire under their arse.
SPONGES: 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. 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 it 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... and trying.