Then you get fat.
In some cases yes, but not if you're making icing. Icing sugar is far finer grained, and as such caster sugar will not be an adequate replacement in this case. (Your icing will be granular and not set properly). You may be able to if it's a meringue recipe, but you'd be better off finding a recipe that does not use icing sugar to begin with.
Does it burn your mouth or melt your skin off...... no, it's pretty much neutral.
Canned icing is not ideal for piping. It has a great consistency for spreading on a cake. You may be able to get it thick enough to pipe simply by adding confectioners sugar to it. Try adding 1/4 cup at first and mixing it in. In order to pipe, it should be thick enough to stand up on top of a spoon. Some decorations such as roses require much thicker icing. I wouldn't even try to do them with canned icing. But, if you have confectioner's sugar on hand, you're better off just making icing from scratch.
Its an icing that you use to have fun with your partner. And you can eat it off your partners body.
To let their defenseman (or whoever is icing the puck) know that the icing call hasn't been waved off by the referee.
Practice! I used to practice making roses with a pastry bag and a mini marshmallow on a toothpick. Best part is, since you're not going to eat the icing, you can put the roses back in the pastry bag and start over. Icing can be made from powdered sugar, lard, and food coloring, or you can buy tubes of icing. Practice writing on a cutting board (you can clean it off and re-use the icing). Cake decorating is a lot of fun, and you can practice making flowers, writing, leaves, vines, all of that with very little cost. You don't have to decorate a cake; practice on a box instead. :)
No. Mine eat the off my walls all the time.
No. You do not have to put icing under the fondant on a cake. You can bake a cake and not put any icing on it and just put fondant on it if you wish. No law forces you to put icing on the cake. With that said, How do you plan to stop the icing at the edge of the fondant? Which will you apply first? Normally sugar in the the icing causes it to stick to the cake and also causes the fondant to stick to the icing. So if you have messy people eating your cakes and do not want the fondant to fall off the plates onto the rug as they walk around the living room at a party, it would be best to use icing as a glue.
Nothing will happen. but after you microwave it and eat it. you're face will melt off!
Icing, I'd guess.
That should not happen, and it does not need to happen. This probably occurs because the cake is either too dry, too crumbly / weak, or you are pressing and spreading the icing around too hard.
Some Off The Top Of My Head: Icing High Sticking Tripping Blind Checking Some Off The Top Of My Head: Icing High StickingTripping Blind Checking