Lyric discussion by Yer_Ma 

Cover art for The Hardest Walk lyrics by Jesus and Mary Chain, The

I think he breaks up with her ("words and touch just struck me numb" implies she doesn't turn him on any more).

@Yer_Ma I agree. I originally thought it was 'to C', which is a clever/witty addition. Then I thought it could be 'to see', which is a good pun. We'll really never know, because it's in its expression, not the written word. Either way, it's a very brilliant tune