The issue is quite complex. And what I am about to say is going to sound offensive to Pakistanis.. and Indians as well.
The following DOES NOT ADDRESS THE SOCIOLOGY OR PSYCHOLOGY OF RAPE.
"Our" society has generally had marriages at lower ages. This has been a deplored practice, but it did have certain benefits as well. At least from the sexual point of view, there were earlier opportunities to achieve sexual gratification for the younger lot. It is animal instinct to want to mate and we search actively for the same when we reach the age to do so. Today there are cases in both India, Pakistan and BD were girls as young as 12 are eager to copulate.. and here is the punchline.. these girls are not from well off families or those with regular internet access but from lower middle class to poor people. The reason I use female as the example as biologically atleast females reach sexual ability and/or awareness(men do not have periods) earlier in our society. This and the proliferation of gossip on the sexual practices in younger ages means that today more and more younger kids know and have a desire for sexual activity. Forget western societies, this is happening in your own neighbourhood.
What we refer to as values or social norms that were prevalent within the "Hindustani" society involved sheltering that (while having debatable impact on rape) did have certain impact on pre-marital or pre-teen ideas about Sex. Through a combination of religion and common values(both Hindu, Muslim and Sikh girls in India used the Saree/Dupatte/covering to shield themselves from gaze) based upon the idea of honour that existing in socities. There were rebels against these "values" then but the general strictness of society and lack of information spread kept it from reaching any measurable level as it is today(my grandmother recounts how in ancestral Lucknow.. if her family members missed catching a girl out and about without cover.. the various visiting Hindu women working would reprimand them about it).