Many women talk about sexual matters, I don't care, we can have that discussion, some even close the meeting with a hug, doesn't mean our pants are going to be on the floor. A lot of women I know freely talk in sexual terms, I am not offended or harassed by such, dear Lord, I am secure enough in my person to hold such conversations. 
Many date in the same office environment today, move in and live together. I wouldn't date women where I work, nor would I work in the same environment with my wife of 30+ years, she might be offended that there are many women who love coming in a talking to me about such things. Young people today are much like the hippies of yore, they talk freely, hug freely, and they aren't shy about the subject of sex, and they broke the norm of not dating in the office that once held the unwritten rule in the workplace.
The key is making it be known one is married or "No", and although they are beautiful and appreciated, it won't be happening. It's easy enough.