As I scroll through the centerfolds
Wishing that the screen was three-dimensional
I know it doesn't seem too conventional
But it'll do untill I get you in the physical

from Big Boi (Ft. Phantogram) – CPU Lyrics on Rap Genius

Meaning

Big Boi is checking out some naked pictures from a female wishing he could actually, physically be getting it in (in pornographic magazines like Playboy, the main attraction is usually the centerfold, a full-page spread of the baddest woman they could get the clothes off of for that issue)
Sending each other nude photos may not be a traditional part of a relationship, but since General Patton and his woman are separated, he has to make do with whatever he can get.

Somewhat related:
Big Boi in an interview:

I like people that love music to be around, so I can’t lock myself in a room alone. That’s no fun. I’d jack off all day if I did that.

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