You make a choice:
10 yuan five pairs of socks and five pairs of socks 10 dollars, which one do you think of selling better? 
Seen such a story: a Christian guilty of smoking at the time of prayer, the priest asked: can smoke when you pray? Father glared at him and said: Of course not. Another congregation in prayer also guilty of smoking, he asked the priest: can pray when smoke? The priest said with appreciation: Of course, when you can pray.
The same thing, is not the same question is asked, the result is completely different, the effect is called Italian language, people tend to dislike lost, to expect, so we do things, right after the first loss to say, will be more receptive to .
----- Chen Sijie Systems Thinking: The Fifth Discipline lecturer and consultant