String Bends

This is a 2.24 minute video response from David MacKenzie on Nov 1st, 2008

Question:

"Lobserve asks: "I'm having trouble with string bends. If I'm in 5th position and I want to play the 8th fret I use my fourth finger but if I want to bend at the 8th fret I think I should use my third finger. This gets confusing in a solo when I seem to need to switch between third and fourth finger for the 8th fret depending on what I want to do there. Is there a good strategy for this situation? Thanks in advance.""