It is safe to eat, I have eaten my own a few times, it's ok, it kinda stings the back of my throat but I love my pre-cum!
Well, why wouldn't it be? I'm not a man, but I know that just like you can drink your own blood, you should be able to drink your own sperm. Google it and see if I'm right.
No, you can't. Eating sperm cell is not good.
Of course, it has protein in it so its good for your teeth ;)
Um, you can if you want to. But it will not taste very good. I wouldn't know because I'm not that stupid to do that. (No offense. I'm not calling you stupid or anything.)