Bailment vs Pledge: Which One to Blame for My 3 Months of Confusion?

Arre, guys, I'm still trying to sleep but my brain's all abuzz with CPC law. So, let's get to the point. I'm totally convinced that bailment is not a gratuitous transfer, but just an act of custody with the intention of return. And pledge, on the other hand, is a bailment with the intention of creating a security interest.

I mean, how can a bailment be gratuitous if the bailee is not the owner? It's like lending someone your bike and expecting it back - you're definitely not doing it for free. But pledge, oh pledge, it's a different story altogether. You're essentially creating a security interest, which means you're using the goods as collateral. So, can someone please tell me why we even compare bailment and pledge in the first place? Let's discuss!