Don't hide it, be honest, just tell her about it, and give her some information./ Tell her you are very serious about it, and if she can't handle it then you would not do it, but you really would like for her to support you on this. You would be surprised the amount of women that are ok with it as long as they are well informed. My fiancee was dead set against them, so I gave her an ultamatum(sp?), I gave her about 600 pages I had printed off about them and told her if she read AND UNDERSTOOD all of it, and still didn't want me to do them I wouldn't. She read it, and two months later she was giving me shots.
Peace, Husker.