Here are some thoughts from guys our age about this issue:

 I was talking to my friend one night and she said that  her sister iut of blue asked their male cousin: "do guys undress girls in their heads?" His answer was yes. My friend said that sometimes they undress certain girls in their heads, and it got me thinking: I dont' want any guy undressing me in his head - it would make me feel so...defiled! That alone is enough reason for me to dress modestly!~girl age 15