Is there enough academic freedom in Pakistan to study subjects like Philosophy ..

I think we mostly are very ignorant from many systems in Pakistan, the world bank recent report says that 1.3% students in Pakistan are from Madrassas.
If we will see the course contents of these Madrassas , they do discus this type of Topics you have pointed to , Like Belief in God, in THE COURSE OF MANTAQ.

Ya,
Sex and Sexuallity are always being seen with suspectious eyes.
It is actually due to the EXPLOITATION of WOMEN in the name of FREEDOM in WESTERN SOCIETIES.

Fashion Shows ,
Miss Worl and Miss Universe Contests ,
Using Women for commercial Advertisements,
Believe me , seeing Ladies with the Advertisment of BLADES/Razer or shaving cream apears very odd to me.
Women are free to use any type of VOLGURE dress , but , to use VEIL/HIJAB is prohibated.

But principaly these are those integral things which drives and sets the society TRENDS and should be brought in discussion and made part of our syllabus.