How many songs did she write about her pussy?
1. If she had a wet ass pussy, she would have written a song about her wet ass pussy. [Assumed]

2. If she had a dry ass pussy, she would have written a song about her dry ass pussy. [Assumed]

3. She did not write a song about having a wet ass pussy and she did not write a song about having a dry ass pussy. [Assumed]

4. She does not have a wet ass pussy and she does not have a dry ass pussy. [From 1-3, by Destructive Dilemma]

5. She neither has a wet ass pussy or a dry ass pussy [4, by De Morgan’s Law]

6. If she has a pussy, she either has a wet ass pussy or a dry ass pussy. [Assumed]

7. She does not have a pussy [5 & 6, by Modus Tollens]

Conclusion: Taylor Swift does not have a vagina, QED.