Had a look at your gallery - I think if you stop posting nudes then it will be a great loss as I think your work is very good and interesting - not everyone objects to nudes and for all the fuss over nudes when ever I post a nude under my other log in name they always get a lot more views than my landscapes - doesnt that tell you something.
Anyway after all the work you put into some of your shots is making a thumbnail such a big deal,it only takes a few minutes.
Carry on posting and make a few minutes time for the thumbnail - I think it would be a loss if you stop posting.
Eddie