Is it normal to sit naked on my couch watching tv and movies?

Sometimes I sit naked on my couch watching TV and DVDs. I recently watched Die Hard while sitting naked on the couch. I live alone and the blinds on my window are closed, so I think this should be acceptable. The only adverse side-effect, as far as I can tell, is that my couch is starting to smell like ass. I went out and purchased some carpet cleaner for the couch and have scrubbed the upholstery with a sponge, but it still smells a little bit. So I have been spraying it with those air fresheners for the time being.