I will ask this question for two reasons:
1) Sometimes people will give something away, if youve been quiet and you say, Will you show WHEN i fold you can sometimes pick something up there...
2) It makes me look a little fishier to some of the regs... I like that
If someone asks me, i rarely show my cards anyway, it gives information to the whole table... Ill just say 'probably not'.
I consider myself relatively adept at table talk though and enjoy leveling people..