The undergrad boys in STEM I swear have never met a woman aside from their mothers. No, please don't follow me home. Please don't buy me food because I was next to you in line. Please don't follow me into a store so you can buy me anything I'm purchasing. You are not invited into my conversation because you think I'm pretty, even if you just want to interrupt to tell me I'm pretty and you want to take me on a date. You are not allowed to hug me and hold me as long as you want just because you want to and it feels good for you, I didn't want a hug and I didn't know you. It isn't cute for you to take things from me and play keep away because you are stronger and taller, it makes you a bully.
Teachers: please don't ignore me when I try and participate or ask a question. I've gotten Cs with no explanation, no marks aside from the grade itself. When I check other's work, theirs is written up with mistakes and they have a higher grade. Honestly that was just one teacher in an undergrad, the rest were pretty awesome, or at least not sexist.