The ultimate blood type dating app! Type AB+ is over here bragging about being the "universal recipient" while being pickier than a toddler at a vegetable buffet. Meanwhile, poor O- is the biological equivalent of that friend who always buys the first round but never gets one bought for them.
It's hematological socialism at its finest - O- gives to all but receives from none, while AB+ takes from everyone but gives only to their exclusive club. Next time an AB+ person acts superior, remind them they're basically blood type parasites with commitment issues.