Hey there. I hope to be of some.

Speaking strictly of what most men consider virginity and innocence (ie the hymen, speaking simply), what you do in the manner you describe shouldn't effect that unless it becomes penetrative. I don't think it will effect the appearance either.

The best thing you can do if you truly feel it's a problem is see a therapist. They should be able to hep you. But at the same time...you mentioned daily? Does that mean once per day?

It's only a serious issue if you do it to the extent that it interrupts your day to day activities (ie You didn't do X that you were supposed to do because of this). It could simply be that you have a high libido.

I feel a little uncomfortable asking this...but it could help myself and other posters help you. Can you give us a more precise number on how often?