Maybe he should

Two other tiny tendrils came slithering up towards his crotch and began to unbuckle his belt and unzip his pants.

"Woah, what are you....... wait wait!" He pleaded.

"Are you scared of me?" She asked with a mischievous grin. "Afraid of what I can do to you? Maybe I'll dissolve you completely," she said with a laugh.

"Oh, God!" He said wide-eyed.

"Oh calm down. Why did you summon me if you didn't know what I was?"

"I...... I didn't uh......"

"You have no clue what you are doing, do you? You aren't even a wizard are you?"

"A wizard? No."

"So you're just a stupid human playing with something he doesn't understand," she said with a disappointed frown on her pink lips. A smile suddenly came across her face before she said: "that means I can do whatever I want to you!"

As his pants popped open the tendrils slid down his boxer, releasing his cock which despite his fear was already fully erect. He stared as she licked her lips again staring at his manhood with a hunger in her eyes. One of the tendrils suddenly and gently brushed along his shaft as Andy let out a moan.

"Oh, this is going to be so much fun," she said with an excited giggle bouncing up and down as her breasts bounced with her.

The two slimy tendrils caressed his member which felt amazing as he squirmed in the bed enjoying the touch. He moaned and every time he did it made her giggle as one of the tendrils began to wrap around his shaft, giving him a few gentle strokes.

"Now, let's see what you taste like," she said as a little dab of precum began to bubble out of the tip of his cock. The other tendril seemed to absorb his white goo and he watched it disappear into the blob that was called Evie. "Oh my, you taste amazing! Are you......... virgin?" She asked wide-eyed as Andy blush a little. "Holy fuck! I haven't had a virgin in centuries. This is going to be fucking awesome!" She said getting super excited which only made Andy more nervous.