I saw one thumb that got a lot of views. It was an extreme closeup of a forearm. The thumb looked like clevage but when you saw the whole image it was very sedate. Hormones being what they are this trick will always work on the general population. The question is, "Why do you want a bunch of comments from teenagers who will go to the playboy website as soon as they're adults and have a credit card?" If you look at most of the great artists they died before getting any recognition. If you get people to talk about your work it will mean more to you if it is a really skilled person or a good or likable person. The only way to find that out is to talk to the other people here.