I shave everywhere, but most places you do try to trim: Enrique Iglesias

Enrique Iglesias' chat-up lines are all ''stupid and immature''. The Spanish lothario has been in an on/off relationship with tennis player Anna Kournikova since 2001, but says if he did need to break the ice with a lady he'd rely on his boyish charm.He told website MailOnline: ''My lines tend to be kind of stupid and immature. If a girl can laugh at a joke then I always think that's cool. That's fun, it's a good opener.''READ: Enrique Iglesias has 'crazy' sex!The 38-year-old 'Hero' star also had some tips on male hygiene, advising anybody with a hairy back to get their clippers out.He added: ''If you have a hairy back, shave it; brush your teeth; fake tan I'm not so much into. Not too much hair I guess - I shave everywhere. I'm kidding, I don't shave everywhere... But most places you do try to trim.''Enrique also told how now he's in his 30s he finds it a little harder to keep in shape, although when he's on tour, his energetic live show ensures he burns off plenty of energy.He added: ''One of the things I've noticed, when you turn 30 and up, you've gotta watch a little bit more what you eat. But in my case, going on tour, two hours on stage, you actually lose a lot of calories, which is good. I notice when I'm not on tour I'm not in as good shape. It helps me like a workout.''When it comes down to the gym or anything that's cardio, like running on the treadmill, I'm very lazy. What I like to do more is sports. Whether it's surfing or paying racquetball with my friends, you sweat a lot and I like that better.''WATCH: Enrique performs 'Hero' live