The first step to an animal's heart is food, or was that a guy. Either way, no one hates food. Now the more important question is what the hell does it eat.

Bob: "You know...this would be easier if you could tell me what you ate."

Slimey: "Kiii..."

In the middle of the downpour, Bob had built a tiny shelter of sticks and leaves. It was just enough to cover Slimey while he sat in the pouring rain.

Using the rain as a kill zone, Bob could safely stay close to slimey without him violating/murdering the shit out of him. 

Bob: "Sooooo...I've brought some stuff that I could find around the place. Got some weird looking blue-fruits, sticks, leaves, stones and a leather bag of stuff. I'm....not too sure what's in this."

Slimey was staring at him intensely, his eyes though adorable, were filled with a distinct hatred for Bob.

Bob: "I don't really know what you eat so I just grabbed anything, I've seen some games where they eat pet food, light novels sometimes let the slimes eat anything so I guess it's an experiment!"

First, the stick. It's the legendary common item known as a stick, it is easily obtained by walking into the forest and picking it up. 

Slimes are quite famous in RPGs for being easily killed, they tend to eat anything in some and some don't even care about them since they're just slimes. 

Now then regarding the stic- CHOMP.

Oh, nevermind. 

Bob: "Alright! So you do eat sticks, how about a rock?"

The other legendary common item call- CHOMP, oh.

Bob: "Well it seems you'll just about eat anything eh, how about this weird frui-MUNCH. Ok, I think I can safely say you eat anything but let's try the bag stuff anyway."

Bob, however, dug into the bag of stuff he found in the house and revealed something...precious.

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Bob: "Oh...panties?"

Slimey: "Kiiiiii!"

Bob: "Gah!"

A furious slimey latched out with tentacles, snatching the lacy undergarments from Bobs hand and absorbing it into his translucent self. Slimey's body released a few puffs of white smoke while Bob was rubbing his hand. 

Bob: "Ooooo, my hand hurts...shiiiiiiiit. At least now I know you really like to eat panties."

Slimey: "Kiiiii!" (No! You stupid human! Don't touch the mistress's clothes!)

Bob: "Yes, yes. You can thank me later. But now, beg boy!"

Slimey: "..." (...)

Bob was now squatting, his arms poised like a dog begging while his voice became that of an adult playing with a child, you all know what voice I'm talking about.

Bob: "Come on boy! Just like this, if you beg nicely I'll give you a tweeeeat(treat)!"

Slimey: "Ki..." (What the fuck.)

Bob: "Don't you want some of these?"

Bob reached into said sack and grabbed another of said undergarment, this time a plain pink one.

Slimey: "Kiiiii!" (You demon scum!)

Slimey lashed out in anger at Bob but the pain of the rain on his tentacles caused him to flinch and return them, Bob was either unknowningly or skillfully staying far away so that slimey wouldn't be able to reach him. Slimey suspects the latter, I know it to be the former. The poor thing...

Slimey: "Ki...." (Suck it in slimey, for mistress' sake...)

With a heavy non-existent heart, Slimey raised his tentacles and drooped them. He imitated the pose in his own squishy way, much to Bob's happiness. 

Bob: "There ya go! Who's a good boy! That's right, it's you!"

Slimey: "..." (...)

Bob: "Hehe, I'm so good at this."

Slimey: "..." (I'm gonna kill him...)