I had never heard a specific taco reference before this thread, but it doesn't take much imagination to put two and two together... Tacos have a certain shape... I don't know what the female version of phallic is, but...yeah... And you put meat in tacos...
“As I am sure any cat owner will be able to tell you,
someone else putting you in a box is entirely different
from getting into a box yourself.” —bisexualbaker