It's a spectrum that is as wide or as narrow as you wish it to be. I personally think it's more narrow than many others do here on HN, for example. I think a real lame effect that happens though is that the instant someone uses the word assault or abuse it suggests much more evil or sexually explicit or intimate acts than what an actual specific situation may have involved. The phrase "sexual assault" can start off being applied to a hand on the back or kiss on the cheek, and then as the description of the event propagates across many people or channels, suddenly it can morph into "rape" or "molestation" -- even though traditionally those words refer to much more serious and specific, intimate and/or violent sexual acts.
It's one of the things I think we as a society, in any general public forum, with no serious moderation or curation or participant filtering (like HN, in my judgment) cannot discuss intelligently or productively because it's always vulnerable to this particular thought error, among others.
More specifically, unwanted sexual touching. I don't like people jostling against me in crowds but that isn't "sexual abuse."
The offense of "sexual assault" requires "sexual behavior" to take place. A security pat down delivered in the appropriate, formal manner is not a display of sexual behavior though it could become such. The mere touching of "intimate" areas does not make it "sexual" per se, however.
Do you consider the forms of cancer which are curable and treatable not a "real" form of cancer?