Even if they aren’t attracted to dimples, they are not a negative. I’ve never heard a guy say, “She’s almost a ten, but those dimples. Bummer.”
Guys are either attracted to them, or they just don’t care. They can only benefit you.
Back dimples (aka dimples of Venus) are pretty dang sexy
Some dimples actually make a girl more attractive while some have no affect on this perception either way either way.