Tie two birds together, although they have four wings, they cannot fly.
Okay. I saw this and thought 'Yeah, I get that'. This guy has it figured out.
I can’t stop looking at women’s boobs.
Then I saw this and realized that I can't stop looking at tits either. I'm with you, dude.
It seems clear someone may not have been referring to actual birds and wings but really women and boobs. If you tie them (women) together you are going to eventually run into trouble with the authorities. If you limit yourself to just looking at their boobs you should be okay.
Good advice from 03cobra. I intend to live by it and suggest you do likewise.
All the best.