Hermied male flowers look like bananas and are usually yellow. If you're worried, just cut off what you may think be hermie parts. If you're in the beginning of flower, and you decide they're hermie, toss the plant. If you're at day 40, just let it go, you'll get a few seeds, which you shouldn't grow as they would also be prone to herme, but the weed on the plant is just fine to smoke. Make sure you give your grow area and equipment a good scrubbing before putting a new grow in to be sure the pollen left in the room is no longer viable.