Is there a difference between a man, say in his 20s, who is single and a bachelor?

I’ve never been the type to believe that there are “common brains” and who have something in common think the same way. Like when someone says “Do men think….” or “Why do cabbies….” and assume, by way of question, that for some reason all men think alike. It takes all of 3 minutes of this site here to see that is not true, but enough of the rambling.

Kind of when I used to watch Card Sharks, and in every episode they had a group of 10. 10 nurses, 10 olympic swimmers, 10 whatevers. They would often have 10 bachelors, or ask “We surveyed 100 bachelors and asked, ‘When you think you’re alone, do you ever sun tan in the nude?’” I could never figure out if something qualifies you to be a bachelor and not a single man. Is there a difference? Seems there must, no matter how small.