Adding "All" to a search field

Using 6.16. I would like to add "All" to some of my search fields. For example: Country - user can just select "All" and it will search for users in all countries. Would like to do the same for other fields like "Body Type" etc. Has anyone done this or have any ideas on how it can be done? Thanx!

Why will you do that!!!

default search choose all if you don't choose any country or Body Type etc.....                                     it's how it work...why reinvent how it works

If you mean the basic search it just does a blanket search on age and M or F. I'm talking in the Advanced Search. Like so....

I'm looking for:   Single

Sex:                  M

Age:                23 to 35

Body Type:       ANY (also has body type choices)

Looking For:     Friendship (this could be an "any" choice as well.

Country:          United States

State"              ANY (also has State choices)

etc. etc. etc.

Like so. If you can add ANY to a field then the user can pare down their search by the fields that are important to them. Make sense??