Casper raised his eyebrows instantly the moment heard that, pressing his cold fingertips against Sebastian's warm chest in an attempt to warm them up a little. "Really?" He asked curiously, tempted to pull back a little so that he could look up at the other to see if his face showed an signs that the other could be messing with him but he refrained and just kept his head buried. He'd noticed the shiver and it had made him smirk a little but he didn't move back, kept his lips against the warm skin of Sebastian's neck as he spoke. "Like where?" He asked curiously, his body tensing instantly the moment he felt Sebastian's fingers against the scars on his back. There wasn't really any possible way that the scars could be avoided from touch, they covered his back, the skin slightly raised and uneven but impossibly smooth to touch. He fell silent, wanting to pull away but not sure if he should.