Might I ask you a question? VS May I ask you a question? Are both useable? What's

[B45]

Might I ask you a question?

VS

May I ask you a question?

Are both useable? What's the difference. Is might more polite than may?

 

[Barb_D]

I'd use only "May" for this one.

 

[emsr2d2]

I find them both perfectly acceptable. However, I find "might" more old-fashioned.