I'll set up a little scenario for you.
Say you're poking around on your husband's old laptop and find his, uh, "stash" of lovely ladies. Now I'm well aware that this particular husband is not blind and, thus, can clearly see a pretty woman other then his wife coming his direction. There was no one naked. The ladies were celebrities, scantly clad, in sexy poses, and all. blond. while his wife is not a cleebrity, tends to dress like a jeans and t-shirt mommy, who's sexiest pose consists of bending over to pick up his dirty laundry and, oh ya, a dark brunette.
If you were this husband's wife would you (a) continue to go to the gym and work on making yourself a hott little trophy wife and make your husband look damn lucky every time he takes you out or (b) quit working on your ass and just dye your hair platinum blond?