My understanding (and experience) with males and testosterone is that it's generally higher according to a man's individual Circadian rhythm. Typically, a man will find himself more energetic at some point during the day or night, and that is when testosterone levels are generally at their highest. However, it also reacts to environmental stimulus in addition to the Circadian rhythm.
My husband is very much a morning person. Once he has his coffee and cigarette, he's ready to tackle the day. It's when he's most assertive and when I'm least likely to offer him a "honey-do" list since he's got his own agenda.
See? Men get hormonal too. Especially on Sunday mornings when football season is going. In our household, at least.