Why can't I wear what I want to wear!

Why is it not ok for me to wear plain jeans, the warmest jumper I can find and a pair of sports trainers everyday? This is what I find most comfortable and practical. But I walk around the streets of Bristol and I see everyone else wearing very trendy, coordinated outfits with all kinds of accessories and I feel 'Oh I should really be making an effort with this!' but I then feel that just putting all the thought and time into it is such a waste of my time, and I would probably be cold and uncomfortable!!! I think if women want to wear really revealing clothes, good on them, if that's what they feel comfortable in and makes them feel good about themselves, right on! That's great! I don't like it when that gets criticised, but equally I don't like it when I get criticised for wearing practical conventional plain comfortable clothes. The men do that everyday, why can't I!!!!!