Women are petite. Men should never be petite unless they want to be rent boys.
Justin Bieber definitely works out regularly with great effort:
He has no choice if he wants to keep his audience as he grows older. 15 year-old girls prefer men who look like the Hanson brothers (remember them), as girls turn into women they value muscle and hair more, they more and more prefer men over boys. When he got famous he needed to be attractive to 15 year-old girls. Now he needs to be attractive to women, so he's going for a different look.
A friend of mine shaved his back hair recently. His 32 year-old fiancee got mad at him, she liked the back hair. Can you imagine a 15 year-old girl saying the same? It must be really rare. Girls and women don't have the same tastes. There's no doubt that he looks better with those muscles. It's why he takes off his shirt. He will probably benefit from adding another 10 lbs.
By the way, Bieber is 1.75 meters apparently -- I just looked it up. The "little guy" thing was just marketing from when he became famous. He's actually close average height for an American adult male, which is 177 cm. He's not petite, he's average in height, above-average in build.
@David
My 6600 posts were definitely worth it.
Writing and putting my thoughts into perspective is the best therapy for me.
Oh I'm taking care of my health, I always make sure I stay at a healthy weight, and I exercise regularly, mostly by having sex.
Good for you.
Sex qualifies as moderate (re: light) exercise, with a MET=6.0 for men apparently:
http://www.mirror.co.uk/lifestyle/health/sex-better-exercise-going-jog-3090856
It burns 4 calories per minute for men, or ~240 calories per hour. It's equivalent to walking.
It would be good for you to add something more intense.
Sex is good for your life, your happiness, your future, your social circle, your hormones, ... but not to keep physically fit.
TBH I go to the gym wirh a personal trainer to improve health, with cardio exercise. We do running, rowing, swimming, cycling at certain paces to lower heart beat at rest. In sum, to stay healthy. As regards muscles, you have to have the right physique. I have above than average broad shoulders but it was not the gym. As for muscles, unless you use steroids, it is very difficult to see the difference. And I have seen women who have been scared by too muscular guys as they felt they seemed a bit vain, especially if they did not have the height to justify the exaggerated muscles.
1) You'll get better cardiovascular results from high-intensity resistance training.
2) I have broad shoulders as well -- all the more reason to do military presses, so as to emphasize an asset.
3) Girls being scared by Ronnie Coleman is irrelevant, as nobody here is advocating that extreme huge look. Look at the studies I posted on the previous page.