This is a very much brazillian joke.
In Brazil, culturally, we tend to pray for “our Lady” (Nossa senhora) as in Jesus mother, Mary. This “our lady” normally comes with a place where there is some history about the Holy Mary, as in where people claim she appeared, or where a small statue of her appeared (this was the case of a city called “Aparecida”, which translates directly to “appeared”, I kid you not), so the whole saying goes “Our Lady of Aparecida” or “Our Lady of Guadalupe”. You know the drill.
Then when we pray, the praying goes like “Our Lady of Aparecida, give me hope”, for example.
That said, there’s this ongoing joke where we pray for “Our lady of the tinniest bike, give me equilibrium” and “Our lady of the eletric Shower, give me resistence”.
The thing is: the resistor that goes on a shower head, here in Brazil is called “resistência”, which is the same word for “resistence”.
See?