A woman's dilemma

Is a woman destined to a constant barrage of unwelcome advances?

Why can't I just waltz into the lunch room without thinking about the next insult to dish to the idiot that has asked me out a million times, whom I have said no to and yet continually winks and flirts with me? (I reported him to his manager by the way. I think that one quickly mutated into harassment)
Why do I have to tell a guy to stop touching me simply because he has touched too much and it just doesn't seem simply "friendly" anymore?
Why do I have to constantly talk about my family to someone who likes to pretend as though they don't exist and recreate "jokingly" me and him scenarios?
Why do I have to tell someone I don't want to hear about any more personal issues, not because I don't want to help, but because he's getting too comfortable and starting to become dependent, thinking he's in love?
Why do I have to cut people off who would be valuable business partners, tennis partners, study buddies, gym buddies, plain old friends...?

Majority of these men know I am married before they approach me, the others know it soon after, but yet, they keep trying, some simply like to flirt, others are constantly drooling. Regardless, I find it infuriating especially when I find the guy repulsive or, to be less harsh, not particularly attractive, then I actually feel more insulted than I thought I could ever be; couple that with the fact that it is pretty depressing.

Generally, I assumed that marriage will be the end of unwanted advances. I'm not silly, "end" is obviously a hyperbole, but still, it appears to have gotten worse. Some people have a theory, that married people are more confident, charismatic and will approach anyone while being easily approachable also. "More" in this sense is relative to the version of said person when he/she was single.
My single friends want me around when there are any mixers, they think I start up the party and get people interacting, they think it's a married thing...; perhaps.
In any case, a woman has a more attractive personality when married I hear.
Some others have a theory, that generally married people are safe. They don't want to leave their spouses for a fling, they just want to have sex with other people and go home, so no strings attached sex is still heavily sought after, and a married woman is the best candidate for such a seeking man, or, a married woman is in search of such sex herself and so is approachable.
Whatever the theory, a polite and subtle "No" should suffice and get an advancing man off a woman's back. Inasmuch as one would hate to repeat one's self, in the event that doesn't work, a glaring and insulting "No" should get such a man to concede turn in the opposite direction and never look back...but alas, it only works that way in a perfect world.

So what about welcomed but perhaps unhelpful advances...