Because there are some girls on this world who are vicious, evil creatures, and will start to haunt you, threatening to report you in if you don't do their bidding!
Unfortunately... that's not a joke
It's why you should go out of your way to insulate yourself from such accusations. Pretend to be gay - extremely gay. Get a reverse beard, even. set it up so that no one would possibly suspect that you were heterosexual, and thus any sexual harassment claim would be laughed off.
This also has the advantage that women will be more comfortable around you and treat you as a friend. Some of them might even lament to you that all of the good men, such as yourself, as gay. You can then slowly and gently nudge them into the idea that they might be able to convert you, if they were good enough in bed.
"Okay , I'll give it a try just once, you can say." And they'll be putting enough effort into it to make things great.
Either that, or go with the refuge in audacity and sexually harass everyone, without exception, so openly, flagrantly, shamelessly, and flamboyantly that no one can possibly blame you for it. If you do it right, everyone would just accept it as a personality quirk, an eccentricity, part of your style, and everyone will love you all the more for it. It'll make them laugh and smile.