I am a teacher, and a fellow employee (not a superior) who is 30 years older than me has sent me several emails asking me out. He signs the emails, "stalkingly yours...." One of the emails had a few comments with sexual innuendos.
He also asks about my whereabouts frequently and has made comments about knowing that I come in to work on Sundays, has heard me talking in the building, etc. (He is not supposed to be at work on Sundays and he has never made an appearance while I was there).
When confronted, he acted extremely guilty, made excuses and even asked, "Did you report me for harassment?" There are more details to this but hopefully this is enough information.