The theory read:
Emperor Claudius II issued an order which today we would call "ni-ni", to be more precise, that "young men, fit for military service, were not allowed to marry (between themselves!This had a negative impact on the general fighting spirit of the army.
A priest named Valentine went against the emperor and continued the wedding ceremonies for lovers (homosexual warriors), for which he was sentenced to death and became a saint posthumously. Valentine’s Day is a Catholic holiday. American homosexuals began celebrating this day in the 1970s, and it was on this day that they entered into the first official same-sex marriages.

With a celebration, youtuber.