During an interview for the mag, Cavill made a surprising admission when asked what it's like to play a character who is inherently good.
"As much as everyone says that Superman is good, a lot of other people might say that that's why they find him boring ... A lot of Batman fans might say that," he said.
However, the British star added: "He's not just good - he chooses to be good, which is what makes him interesting to me."
Cavill also revealed he never takes his movie alter-egos home with him - because he sees acting as his job, not his life.
Asked whether it was hard to convey the chemistry that has to exist between Clark/Superman and Lois Lane (Amy Adams), he said: "Well, it's our job as actors to make it look like it's not manufactured.
"If you have two actors who understand their characters - and therefore what they are trying to portray - then all they need to do is be the characters and there's a chemistry there."
Henry, 30, went on: "I mean, there are these fantasies among people who watch movies where they're like, 'Oh, there's a chemistry between them - something going on.' And sometimes there is.
"But for me, it's more like, I go to work, I do a job, I play a role, and then I go home. I don't wear a cape at home. I'm not an invulnerable alien at home. I'm not in love with a woman called Lois Lane at home.
"I know there are a lot of people who like to get very involved in their characters, but I, personally, find it too involved. I just like to do it as a job - and it's my job to make it look real."
'Man Of Steel' also stars Russell Crowe, Michael Shannon, Diane Lane and Kevin Costner.
Suggested For You
Get top stories and blog posts emailed to me each day. Newsletters may offer personalized content or advertisements. Learn more