Something to consider: why does being "less of a man" matter to you? Why do you feel the need to be reassured about this? What is wrong with being weak and submissive? Is it a self-esteem issue? Are you afraid of being thought less of by your partners? By other men? I could tell you that enjoying different sex things doesn't make you more or less "manly", but I'm not sure it would be much help if you don't figure out/answer the underlying fear.