I have a wedding in a couple weeks and was thinking about cake flowers. Not that I have to actually put flowers on the cake this time, but I was wondering, what do all of you do when you have to put gobs of flowers on the cake (e.g. some on each lip of each layer on a stacked cake). How do you get them to stay? I've never done it, but do you actually stick a short stem into the frosting? I would be nervous about contamination.