He said: “They don’t approach me and I don’t think I’m sexy.
“If there is anything sexy about me maybe it’s that I’m a goof and I don’t take myself seriously. Isn’t that kind of sexy? If you just take the p**s out of yourself a bit.
“I don’t think sexy is, ‘Hi, nice to meet you.’ I sing beautiful songs and I mean what I say.”
Michael split from his previous girlfriend Emily Blunt in 2008 amid rumours of his infidelity and he revealed their break-up taught him to be careful about discussing his love life.
He said: “I learned a lot and from now on my private life remains that. I’m not saying you have to be rude about it when people ask, but I just decline to speak about my love life.”