It is not necessary to ask a man what he likes women. In this regard, on the first date does not make sense: he just put a young man in a stupor and forced to choose between the standard expression "like you" honest and detailed answer. If a man may not be very resourceful and can not find the words that will suit you, the evening is likely to be damaged. By the way, we should not raise the subject and ex-girlfriends.
Try to make communication on a first date with ease. No need to hold the exam questions to a man throwing logic and erudition. He may find you boring, boring and overly demanding special. By the way, the same applies to the discussion of economics, politics, religion and so forth. It will be especially painful if your views on various issues do not come together, and the first date to end the conflict.
At the end, do not ask openly, you liked the young man or not. This question is too netaktichen and frank, and it requires a direct answer, which a man may not be willing to give. If you really liked his companion, he must find a way to demonstrate this. If he already knew that he would not pursue a relationship with you, it is unlikely to want to directly explain why.