Sure, spending most of your time with attractive men who are all catches is great... but you can imagine how all that testosterone can overwhelm a gal.

Restaurant kitchens are highly pressurised environments, with lots of young men, and that means one thing: testosterone. It's not brutal - it's military. It is regimented, tough. People are put into compartments and have to do exactly what they're told or the whole thing falls apart.

Regardless of your sex, if you have elevated testosterone levels in your blood, you're more likely to think a face with a neutral expression is instead looking threatening.

A doctor prescribed testosterone for depression and it truly helped me.

Stadium tunnels are often tight and filled with testosterone. With that combination of a confined space and emotions running high you get the ideal scenario for confrontation.

I think so many men have this really sharp feeling of being a disappointment in their mid-forties. There's probably something chemical about it - the drop of testosterone, the fact that you don't feel the same way physically. It's a real thing. You do tend to feel like a disappointment.

As a society, we have this perception that women are emotional. The research, however, tells us that, on trading floors, that poor risk rises and falls with testosterone levels, and these trading floors are 85 percent, 90 percent male, and these gentlemen tend, under periods of stress, to show off for each other. That's dangerous.

When my own son was 12, we didn't want toy guns in the house. So he just picked up a stick and went, 'Bam! Bam! Bam!' That's the testosterone of a 12-year-old boy.

Gender-dominated environments are not good... particularly in the financial sector where there are too few women. In gender-dominated environments, men have a tendency to... show how hairy chested they are, compared with the man who's sitting next to them. I honestly think that there should never be too much testosterone in one room.

The debate analysis in the media is rampant with contest analogies of war, baseball, boxing, football; you name it. Any testosterone contest imaginable is fair game.

Every time you cuddle with your children, you're likely to be driving down your testosterone.

High testosterone levels have been proven to make men more likely to commit crimes. The tendency in men toward risky behaviour keeps turning up even where socialization is different, and so does crime and delinquency.

What's so interesting about 'Point Break' to me is that it's a study of testosterone and adrenaline by a woman. That's why it's little more interesting than it should be.

In my experience, it's all wonderful with girls until about 16. Around that time, boys kind of calm down and start focusing their testosterone. Girls get a little challenging, especially for fathers.

If you bring in testosterone outside your body, it probably stops producing it because it thinks you're going to get it from the outside.

I like there to be some testosterone in rock, and it's like I'm the one in the dress who has to provide it.

I get really aggravated if I don't train, if I don't let that testosterone out.

There's a great sense of achievement, testosterone, fun, being able to live out your masculinity when you play an action role or an action-adventure or a real tough-guy role.

If your body produces testosterone naturally, fine. Mine doesn't.

Socialism is simply Communism for people without the testosterone to man the barricades.