Was "Keep the Cage Door Open" a Sexual Reference?

Web: What does that mean Keep the cage door open?

Her: "Let me know when you figure it out." Then leaves her door open.

Have you ever seen where one of the two super-heroes tries to do his partner's lover? Let alone in the last scene!?

So Connor kept the golf bribe membership?

No cops got busted for anything?

Why talk Japanese out of buying MicroCon?

If you obstruct a a police investigation, you don't get a desk job. You go to prison.

Was "Keep the cage door open" a sexual reference? I'm so confused.