Two Turntables? Why


OK, been thinking about this for a bit.  Why do people own two turntables?  OK, I understand some traditional uses for a 2nd turntable.  One that is just for 78's, for example.  You may be on a journey to a set up you really enjoy listening to.  You may have even gone the route of an external power supply, isolators, base, phono PreAmp.  All of the accouterments you enjoy because, well, you enjoy records.  But if you are enjoying your LPs and you have purchased a turntable, cartridge and potentially a tonearm that you really enjoy, why do you need a 2nd turntable?  

If you go through all that effort and fun to get to a sound and system that makes you happy, and many of us have, why do it for two or more turntables.  You got a good one, why do you need a 2nd?  Maybe you play all your old LPs from High School on one standard turntable and play all your MoFi and QRP copies on the better machine.  I don't know. 

So, those of you who own more than one turntable, please let me know why you have more than one.  Let me know your thinking.  I'm curious.

Thanks 
pgaulke60
You can arrange a constant play using two of them.
You can compare different tonearm and cartridges. 
You can separate them in two different systems if needed.
You can have one for backup if it's rare one.  
And it's a lot of fun. 

Here is what i use, but how can i ignore some others like this or that, they are so nice. 

It's like being in the studio surrounded by audio gear. Constant learning process also. I prefer vintage turntables from the golden era, it's a bit like your own museum too. This is an interesting hobby, not just one turntable to play records. 
chicks dig turntables......multiple.:-)

i've had as many as 5 at once


Dang. You win again. I've never had the stamina for more than three, even with Viagra.
I did have 6 at one time, spread around the house on varying systems.
Now down to just 3.
2 in my main system where one is stereo and the other is pure mono.
1 in my daughters system.

So to cut to why two?
As you can see i can switch from stereo to mono in seconds on the phono pre.
Thats about all I got for a serious reason.

Any other good reason is because I can.....
I've got three in my system. Two TT's have pretty much stationary cartridges while one TT gets what ever I'm in the mood for.