I can see why some women wear their bf's clothes. It smells like the boyfriend and makes them feel safe and happy. I have worn guys clothes in the past, like a hoodie on a cold night. But I don't wear their clothes all the time.
My sister wears her husband's t shirts at home because she left all her clothes here. : D She still hasn't gone shopping to by clothes to wear at home. And we were having a conversation and bro in law joined and said, "I like her in my shirt because she looks really cute."
It's just nice to wear their shirts or sweatshirts and smell their smells. When you're out in public with their stuff on you're basically saying "yeah this is my boyfriend's sweatshirt he's mine so back off" claiming your territory.
Oh there are so many reasons. First, they are big and comfy. Second, they kind of mark me (not really). In my head, I'm like, "yeah, I belong to him." Lastly, which I think is the most important for me is that it smells like him.
Huh it's easy. You wear his shirt and look both cute (as it will be bigger on you) and sexy (with probably nothing under it). It smells a mix of his fucking amazing scent and cologne and a bit of testosterone. When you wear and smell it, you're officially his and his only and comes a relief into your troubled, fucked up mind. It is the most amazing feeling in the world. I wish I experienced it.