I'm thinking about putting my girlfriend's new perfume in the trashcan where she wouldn't see it.
Do you really think its wise to dispose of your girlfriends perfume?
I just hate the smell of it!
You shouldn't throw away something that belongs to another person without their permission since that person will be very emotionally distraught when they find their possession is missing. You should talk to your girlfriend about her choice of perfume and find an alternate if her current one bothers you instead of throwing it away.
I just don't like it.
She probably worked hard and paid money for it. Throwing it away is a waste of money and she will likely just end up replacing it anyways with the same brand.