The Cake Test
As this man points out, there’s no way this isn’t a test. The man should make his significant other happy by going all out to buy her double the cake and gifts just to be sure. There’s no way she’s buying her own cake. We hope he catches on early to avoid pressure and last-minute scrambling to get her a fitting cake.
Of course, she’s just trying to see if he knows her well enough to know that she actually wants him to get her a cake and birthday gifts. When she says she’s buying her own cake, buy her the biggest cake in the market. No one wants to buy their own birthday cake. Don’t ever take such words seriously – it’s most likely a trap.