[Feeling and seeing Sans writhe in pleasure underneath him makes Mettaton's head spin. It's hard to think straight, really, as he feels his soul moving closer to Sans's own. When they finally connect he gasps, his body sparking with electricity and magic, feeling it dance down his arms.]

Goodness, I love how you feel.

[He continues to nip and bite at Sans's neck, feeling wave after wave of pleasure hit him. Sans whispers his name and he can't hold back anymore. With their souls tied together, he uses one hand to capture Sans's wrists and pin his arms above his skull.]

Don't stop yourself, darling. I want to hear you scream my name.

[He whispers that against the side of Sans's skull, warm magic jumping from his lips to enter the bone. He's not going to hold back either, he thinks. No matter how much he thinks that he should be pulling himself together, the desire to indulge himself and lose control is almost overwhelming. He's pretty sure he'll be calling Sans's name by the end of the night. He pulls away from Sans enough to look him in the eyesockets. The glow from their combined souls, united as one, caress the angles of his face as he smiles down at him.]

I have... many ideas for what we're doing right now. And if you'll let me, I want to do as many as possible.

[He's gonna rock Sans's world. There's no doubt there.]