Slenderman actually did very little. Teleporting, causing technical malfunctions, and leaving psychological imprints on targets all happened by itself so long as he was present, independent to what he wanted to do; more a biological feature than an actual malicious act. It was good that the suffering he caused was his goal then he supposed.

It was nature. No emotion, no grudge, just nature. His actions, while different from others beings, were simply what he did to continue his living existence. No different from a human taking the effort to cook food rather than eat it raw. It wasn't something he enjoyed, but it was what it was. No sense complaining about it. Especially sense his species couldn't communicate verbally, and there weren't any other creatures in the area that could understand his mental messages as anything but headaches and hallucinations.

None, but the Proxy.

The Proxy, Slenderman supposed, was once a human. He wasn't sure what could have possibly happened to him to leave his mind twisted and damage enough to be able to hear his mental messages for what they were without being negatively effected.

Naturally, this ability to communicate made the Proxy useful, and Slenderman employed the Proxy as his helper. He would stalk Slenderman's victims and lure them away from ways out; herding them closer to Slenderman so he could go through his process. In exchange, the Proxy would be given some of the remaining meat to feed.

The process was simple, easy, and efficient; a symbiotic relationship between two lifeforms. It did, however, result in a strange result. For the longest time, Slenderman had figured that his species, whatever it was, was one that was sentient without emotion. He'd been aware of odd emptiness in the past, and wondered briefly if there were others of his kind, and if they ever felt the same.

But these were simply passing thoughts, they were simple. Surly they weren't actual emotions; emotions were complex. Or at least, he had convinced himself of such.

There was, however, no denying that the feeling he had developed in the presence of the Proxy was, in fact, emotion. It was natural, he supposed, for a creature of isolation to experience an emotional response from changing lifestyles to one that would have him interacting with another creature.

Unfortunately, this caused him to become aware that emotions were something he could experience, which was not something he was certain about. Slenderman decided it was best to contemplate what this would mean for awhile, so he could better understand its meaning. This left the Proxy without orders for several hours, which was not business as usual.

So, to figure out what was wrong, the Proxy approached Slenderman. Slenderman looked at the Proxy, confused by his presence. More accurately, he was confused by his reaction to the Proxy. A rush of chemical surged within throughout his system; causing specific glads in his brain to begin acting up in a rather uncomfortable way.

The human word for it, he believed, was lust.

It was a rather illogical response, Slenderman felt, considering he and the Proxy were both males of their species, and he'd never felt the urge to mate before. Then again, he couldn't just disobey his feelings. If he was going to accept that he was a being with emotions, the least he could do was at least act on them.

This information was not conveyed to the Proxy, leaving him very confused when he was ensnared in Slenderman's many tentacles. He didn't mind it much, as his mind was in fact broken. In fact, in his own state of being immune to any fear, the Proxy was left taking an odd enjoyment in being constricted like he was. He didn't even mind when more tentacles shot out, forcefully ripping what little clothes he worn off his body.

Slenderman was compelled to observe the Proxy's body before continued, and saw that the Proxy's member had become hardened as he squirmed against Slenderman's tendrils. Knowing that this was a human sign of arousal, Slenderman took this as a sign to proceed.

One tendril coiled around the Proxy's member, and began stroking it as another tendril began to prod into the human's puckered hole, making him moan. The sound was quite similar to ones Slenderman had heard from the Proxy while the Proxy fed, a sign of enjoyment. Another odd sensation as he watched the Proxy moan, and he forced two more tendrils into the Proxy's mouth.

The Proxy moaned around the wriggling appendages, seeming to love it as they were pushed deeper into his throat. The tendrils were the only part of Slenderman's body that could actually experience pain or pleasure, an extreme amount of the latter in this case.

The Proxy reached his climax quickly, coating Slenderman's tendril in cum, but remaining erect; a testament to his endurance. Slenderman's own climax was quite a ways off, as his species was meant to mate for hours at a time. Luckily, the Proxy wouldn't mind being his toy for awhile.

Slenderman forced more and more tendrils into the Proxy, managing to get three inside his throat, four into his ass, and even managing to push on of the smaller ones into the slit of the Proxy's cock, which really seemed to make him writhe.

It was almost sunrise by the time Slenderman stopped, his tendrils spasming and releasing a flood of what humans call cum into the Proxy from all angles. The Proxy collapsed onto the ground, likely unable to feel his legs as he panted hard; having cum more times than Slenderman cared to count; a fact that made Slenderman aware that his species was also capable of feeling pride.

"M-more..." The Proxy groaned weakly. It was the first word Slenderman had ever heard the Proxy actually say. More than four hours of being used as a pleasure toy, and the Proxy still wasn't satisfied? Perhaps he wasn't human after all. "More!" The Proxy hissed.

As Slenderman's tendrils unfurled again, the Proxy's lust feeding into his own, he realized that he and the Proxy would almost definitely not be leaving to hunt today.