Hot steamy water of course
You can use mousse. Or hairspray.
Hair doesn't harm hairspray. Hairspray harms hair.
Yes, this hairspray is safe to use on children, just be sure to avoid facial contact.
yes, because your hair will look like crap. It's not "bad" to use hairspray on wet hair, it just won't work as well. Hairspray is meant to be used on dry hair.
Yes, you can put your clip on hair extensions in without using hairspray. If you do use hairspray, never spray directly on the extensions.
In tights, I think you use hairspray
yes
Hairspray !
I guess it does. But use hairspray with hard-to-hold styles that works great. Don't use gel, its too icky.
This depends on the type of hairspray and use. For example, if you spray a bottle of hairspray into one's eyes it would certainly be harmful. If you get a little hairspray on your finger and then lick it later, you probably won't die. Most hairspray bottles have safety information as well as directions on the bottle, so reading this is your best bet.
You use a straghtener. Then use hairspray.