Those accusations can come from weird places. I was once accused of sexual harassment by a male coworker (I'm a straight male, and a father of two). When summoned by HR to face the victim it turned out that he felt that touching his screen (when explaining something) violated his personal space. Not that it is necessarily relevant to your case but if you feel innocent then you probably are - unless you're a psychopat…
Wow, that's quite extreme. But it doesn't have to be a crazy person like that. Some more everyday activities that might make someone uncomfortable in the workplace even without direct interactions: - wearing T-shirts with scantily clad women in the workplace ( http://edition.cnn.com/2014/11/13/living/matt-taylor-shirt-p... ) - wearing other T-shirts deemed inappropriate (heavy metal T-shirts with pentagrams or whatev…
Displaying scantily clad women in the workplace in any shape or form would most certainly warrant an HR action. As a manager of an offending individual I'd certainly be the 1st one to react.