He hid his emotions though, never revealing how he felt, only his basest desires. The appearance of improper thoughts gave him a reputation that, while vile, worked in his favour with the Dark Lord and his band of degenerate Death Eaters.
and this Severus still wasn't sure why Potter needed the sword, but in his struggle against death perhaps he needed something more personal—willingly given—from Severus as well.
and the fact that Snape does not feel *completely* alone, making this a welcome wanking fantasy...
Combine for a whole lot of LOVE!
*adds to Memories, not the least for the fact that this is SNARRY!* :3