I realized that when bad things do happen, you don't really want to believe that they happened... These questions might very well seem pretty stupid from a normal point of view, or even my own point of view, normally. But I still feel it's neccesary for me to ask, just to clarify.

If some stranger masturbates in public transport, next to you - (in addition to "a crime" or highly inappropriate,) what do you call this?
Is this sexual abuse? Sexual assault?

What if someone you know and trust very well masturbates in the same room as you? Against your consent but without asking - probably not aware that you noticed? Regardless of why exactly they would do it I guess...
Is that sexual abuse too? Even if it only happened a few times over a couple of weeks and then never again?

I hesitated to post on the "Survivors of Abuse" forums, as the title seemed slightly imposing. I mean, no one touched me. It was just some stupid stranger sitting next to me. And err well someone important to me later on but that's... A bit more complicated, yeah I guess I'll send myself off to make a thread in the "Survivors of Abuse" forums tomorrow, if I find time for it.