Sorry if this seems like an odd / pointless question,

But does anybody know any good songs (Rock) That incorporate 2 bass guitars*?

*PLEASE dont ask why
Spinal Tap - Big Bottom

It's ALL bass, baby

For serious songs, some of Rush's newer material (Test For Echo, Vapor Trails) has bass overdubs in parts. Check out "Ceiling Unlimited"
Q: Favourite Pink Floyd song?
A: The one where they get wicked high and play Emin and A for an hour.
Neds atomic dustbin had 2 bass players, and I believe the Rezillos may have had 2 as well at some point, maybe check them out.
Back In The Saddle by Aerosmith. Tom Hamilton plays bass and Joe Perry also plays a 6-string bass on it.
"One of These Days" by Pink Floyd
Mother Earth is pregnant for the third time
For y'all have knocked her up.
I have tasted the maggots in the mind of the universe
I was not offended
For I knew I had to rise above it all
Or drown in my own shit.
Yes- The Fish (Schindleria Praematurus). Though that'll probably need way more then two basses to play it the way it was played in the studio.
How to achieve Frank Zappa's guitar tone:
Quote by Thefallofman
Step 1: Buy a Gibson SG
Step 2: Insert Green Ringer, EQ, 3 dead squirrels and a microwave into said SG
Step 3: Plug in and freak the **** out.
"Walk on the Wild Side" by Lou Reed...

There are overdubbed bass parts on that song... He plays the second bassline one octave higher (so it's the same bass part, just plus 12 frets everywhere)
Please don't confront me with my failures. I had not forgotten them.