Grow them out to just before the male flowers start to open. Then I'd kill the plants, but save out one branch from each and put them in vases of water (well away from the female). Harvest a little pollen. Fertilize two branches of your female plant with a paintbrush and you have some free seeds for your next grow.
The male plants can be dried, blenderized and put into brownies- won't be as potent as female bud, but you'll get a buzz.
Male is also good to cut your bud with when you are low on stash. It is healthier than using tobacco and adds a bit of THC.
Last possibility, is to dry it and use it when your mooching friend (we all got one) comes over.
Granny