First off, sorry, my last post was a bit harsh to you Heroine.
Re you showing magazines to your male colleagues: It's unprofessional of you, but probably no worse, especially if you are friends outside of work. But if your colleague had at any point expressed discomfort, or asked you to stop, and you continued, that'd be harassment.
I've never been accused of harassment out of a clear blue sky, while going about my legitimate, non confrontational, considerate to others, professional, way. But I have on occasion been asked to drop a particular subject, and I have always respected that.