Prepositions show the relationship between nouns and other words in a sentence, but they don't change the grammatical gender of a noun.
Here's why:
* Grammatical gender is a feature of some languages, not a feature of English. English doesn't have grammatical gender in the same way that French or German does.
* Nouns are inherently feminine or masculine in some languages. This is a property of the word itself, not something that can be changed with a preposition.
Example:
In French, the word for "table" is "table" and it's feminine, while the word for "chair" is "chaise" and it's feminine. There's no preposition that can make "table" masculine.
Let me know if you have any other questions about grammar!