Like I said before, as lony as you use it (to your advantage) and don't abuse it, you'll be fine. Kegels are usually done for a couple of reasons:
-learn to have more powerful orgasms
-a strong pc muscle, when used correctly, and contracting the muscle just before orgasm/ejaculation, for the duration of the orgasm, one the muscle is strong, will allow you to orgasm without ejaculating; lessening your recovery period.
-for people who have poor bladder control to help gain better control.
-help to create stronger erections.
You'll see a number of people around here that suggest "actionlove" as not being the place you want to go to get your information. Within common errors and misspelled words, I would questions much of the advice that is provided there. While a few things on their site are true, most of it has no evidence. Just remember what I mentioned before (especially the part of makiing sure it's only the pc muscle your contracting) and you'll be fine. Good luck with those kegels! :d