Putting them inside - just buy the type of egg/bullet that has a thick gel coating and you can SEE that the entry hole of the wires is sealed.

While they are good outside, they are better inside - used at the same time as a conventional vibe on your clit. The deep vibes feel very good. And if you're with your partner - think of him as well. It feels delightful to have the end of your cock vibed each time you push it in deep.

Oh and don't worry about the wires beaking; if they did you'd just squat and lay it like and egg.....