I don't know if you've ever heard of this variety before, but I have what's known as Magic Strawberries.
I bought them as seedlings and they grew into these healthy strong plants that send out lots of runners and flower all the time. The flowers turn into beautiful looking small green strawberries and then, this is the magic part, they disappear never to be seen again.
On the plant label it says:
"Magic Strawberries are guaranteed to get you anxious to eat delicious, home grown, ripe strawberries but then, through a unique and patented process, the green strawberries just disapear. Great gift for gardeners who like practical jokes."
I think that patented process has something to do with these hungry little guys.
Oh well, when all else fails, there are always U-Pick Strawberry Farms that aren't too far away. Their strawberries are always ripe, delicious and magic free.