Thank you. I'm not sure how old you are, but I found out that somewhere in a man's mid to late 40s a change starts to happen. No one really talks about it, but if you don't bitch about something every day then the next time you shower you fall and break all your hips.
At first you only need to bitch or be generally contrary for no good reason for a few minutes each day, but it slowly increases each year. My dad just hit 70, and at this point he seems to need around 5 hours per day. I know it seems tiresome and pointless and annoying as all hell, but the truth is old guys just don't want their hips to break.
Unrelated, but very similar, you start to need to ramble on endlessly about something no one around you cares about more and more each year, or else your head explodes. This is why eventually most older men end up either bitching about something or rambling pointlessly pretty much every time you see them. :/