I (I am a bloke) would be wary of a guy who asks such personal stuff by email. Maybe I am bit old-fashioned, ( I am pushing 50, but lived my reckless years in the 70's, so am by no means a prude) but what happened to courtship? Any lady worthy of the title, in my humble opinion, should expect such things to be addressed after a few dates, not in the office, as casual chat! It sounds to me like he is after a 'good time' or he would show some restraint and ask you out. I think he wants the fun without the commitment. If you are happy with this relationship, as it stands, go ahead. I suggest caution. To answer your question, yes, I think he fancies you. But is it you he fancies, or your body? A subtle difference.