I've noticed this on two ocassions. In my previous job, there was this really sexy puertorican girl (who has been living with her bf for years) who would give me some signs of attraction. Sometimes she would search for me around the aisles. I remember once, we were in the break room and she accompanied me there. She waited there till I finished eating, and when I finished she walked in front of me, making a motion of taking off her blouse. Now , I have another coworker, who randomly smiles at me and sometimes she "searches" me around the place. Like yesterday, I was warming up my car and I caught her looking at me and waving goodbye. Both of them have boyfriends and been living with them for years.