this is covered in dozens of other threads my man... search function is a wonderful thing.

Yes, you can just pull the male thingy off. No, there's no reason to panic. Unless you're worried about the pollen contaminating other plants there's nothing much to worry about, you'll just have some seeds in your smoke.

It's been speculated by DJ Short that hermaphrodism is pretty standard in Sativa's... Breeding tips | Cannabis Culture Magazine