That's... quite the line of inquiry. Let's break it down:

1. **Why do people buy fake penises?** There are many reasons, including sexual exploration, personal comfort, accessibility, body image, and relationship factors.

2. **Is it because they can't afford real ones?** Affordability is rarely the primary reason, as it's about preferences and needs, not necessarily economics.

3. **Are real penises really expensive?** Biological penises are, generally, free.

4. **What is a fake penis? What is a real penis?** A fake penis is a manufactured sex toy, typically made of silicone or other materials. A real penis is a biological male sex organ.

5. **How to distinguish between real and fake penises?** Usually, one is attached to a person, and the other comes in a box.

I hope that clears things up... or at least muddies them slightly less.