I agree with the guys, I also LOVED my college dorm experiences!
Here's a quick list how you can get your hands (cum) on your dormmates shoes:
1., socialise - go to parties, organise parties, even small parties in your room with alcohol. In these parties eventually everybody gets drunk, girls take off their uncomfy shoes, and nobody cares why you go to the toilet with a pair of these shoes in your hands. And also noone wonders if they can't find their shoes easily in the morning, since who remembers where she took them off. If the shoe is somewhat wet in the morning, it could be of some beer spilling into it...

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2., help girls with thier studies, preferably in their room, make sure that by time it becomes natural that you are in their room. Sometimes they'll have to go to the toilet, or to a class, and you'll be left alone for a certain time there.
3., Do number 1 and 2 regularly and by time (3-4 months) there will be a couple of girls that will be your close friends. Talk to them about your lovelife (or better it's absence), make them feel you trust them and they can trust you, and by time you can get to the point where they can be told parts of truth: a., you like her shoes, she and the shoes aswell look gorgeous. b., you would like to take pictures of her and her shoes. c., you would love to go shoe shopping with her. d., if you can afford, you might offer her to buy her a pair of shoe she really likes - either she says OK instantly or hesitates and you can release her guilty feeling about accepting this donation by telling her you would be happy to get her old worn shoes in exchange.
At this point there can be about 3 reactions:
- absolutely suprisingly and unbelievably she simply says OK.
- she asks you why you would want her shoes - in which case you should not tell her of course that you want to have a massive load of cum in them, but something nice, like you LIKE these shoes, they are nice, and they would remind you of her, etc etc...
- she says she cannot accept this from you and does not want to give you her old shoes, but if you have done things properly in the last months, this is the most unlikely thing to happen. Even if it happens, don't force, drop the conversation, and keep doing number 1 and 2 for some more months, and get back to the topic later when you both are a bit drunk, and happy and having fun. She then most likely will either tell you her real reasons why she would not give you her shoes or simply give them to you.
Now there are two possible reasons why she would not want you to have her shoes despite your good friendship and trust:
- most common is that she thinks her feet and shoes are stinky and her feet are ugly. That's the easy ride, since all you have to do is keep telling her for weeks how nice her feet are and a night when there are only the two of you and you are drunk, you can even smell her feet or shoes to prove that they are not at all stinky, in the contrary, you LIKE her shoe smell. You shoud not say it turns you on sexually, just say it's somehow sweet.
- rare but can happan after all that she thinks for some unexplainable reason

that you want to have some weird sexual thing with her shoes and that she cannot let happen. In this case you drop the conversation, and for some more months you keep telling her you only LIKE those shoes, nothing else. In the last 15 years there was no girl I could not convince to give me her shoes eventually with these techniques. The longest period was about 1,5 years, but eventually she gave me her most beautiful and by then really worn boots.

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Beside these techniques, you can always find shoes after parties at dawn, in trash bins, in locker rooms. A great place is dance classes where girls change their shoes for sure for a few hours and after them they wear again.
So good luck my friend, your best years are just ahead of you!