If you came home and saw your sister topless what would you do?

Buffboy2000
Put yourself in this position, you are a 15 year old boy, you arrive home from school early. As you are walking by the window to your backyard you notice your 18 year old sister sunbathing topless. What do you do?
(Answer honestly, no one will judge you, at least I won't.)
If you came home and saw your sister topless what would you do?
Close the blinds and act like you didn't see anything.
Vote A
Close the blinds and make a lot of noise to let her know that someone is home.
Vote B
Stay hidden and continue to watch.
Vote C
Select age and gender to cast your vote:
GirlGuy
If you came home and saw your sister topless what would you do?
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