No Richard "sexual assault" DOES NOT require force or the threat of force. You need to rethink this.
The terms "Assault" and "Sexual Assault" are too different things and having a word in common does not change that. The simplest and clearest example of that is someone performing sexual acts on a comatose person they just came across. That would be sexual assault without the use of force.
Please re-read the post that you were responding to and the criminal code.