Man's Best Friend?

If you've come here thinking that you're going to read about a dog - sorry, my mind is on another track, again.
I am referring to men though, because I'm not too sure how this applies to women, and what their reasoning and thinking is behind this one (or anything really, not so chaps :-) )
Us boys do a fair amount of drinking; we have braai's, watch sport on TV at home or with our mates, go to pubs etc. and always we are very keen to imbibe, and I'm going to use beer as the beverage of choice, for simplicity, and because it is quite a favourite.
There are other times in our lives when we also drink, but we drink other things, like coffee, or tea, or a Coke, or maybe even water.  In the pub we will order a beer, and drink it, and usually even before that one is finished we will have ordered our next one.  And we will continue doing this throughout the evening.
Sometimes, with some people, the same applies to coffee and tea.  We drink copious amounts of the stuff, one after the other, throughout the day.  So what?
The thing is -  after I've had my first 500ml of beer I am most certainly no longer thirsty.  We do after all drink stuff because we're thirsty don't we?  So why do I have the second, third, fourth ... ?
Now with my tea addiction an answer to this poser immediately comes to mind - but then I suffer from another condition that not everyone else may do - I live alone.  Often I will wander off in the direction of the kettle and make another cup of tea as a gap filler: a break between some work that I'm doing, because I'm bored and don't know what to do with myself etc.  Many other people also use food as their gap filler, and quite often this gap filler is an emotional one, a sad or depressed one, and out comes the comfort food - for me that's sweets.
Back to the beer.  Clearly we are not thirsty, so there must be another reason why we want a second one.
Maybe we like the fact that we are now on the road to getting pissed and we like it when we are pissed.  We love the way that we get loud, and argumentative, and some guys get aggressive, and we can't stand properly, and start to slur our words, and we struggle to get home, and often do so quite literally taking our life, and the lives of others, in our hands, and the way our body responds with foul breath, bloatedness, belching, farting, unhealthy and fat bodies, hangovers, not being able to get out of bed the next day, feeling sore and uncomfortable, staying in bed while most of the beautiful day outside wastes away ... any other results that I've missed?
And surely the answer to this question has to be - I don't think so!
Okay then, we're getting there, we're not thirsty, we don't really like to get pissed - so why do we do it.
Well imagine standing around in a pub with all your mates talking all sorts of garbage and ogling the chicks all night long, and you have nothing in your hands - what do you do with them?
It's also a bit like me telling my Navy and sporting buddies that I thought that the last rugby test match that I watched which the Boks won and played really well in was "jolly nice" - do me a favour, of course I'd say that I thought it was "effing great".
Then again, I have in the past done the almost unthinkable and spent many weeks going to my local and standing there with a tall glass of lime juice and water in my hands all night long - tough, but doable.
And, like most guys will say, I do enjoy the taste of my first beer and often look forward to it - but then again I might also actually be thirsty then.

And I shall conclude these thoughts by being inconclusive - why then do you do it?