How does it feel to use om or hvis, meaning if... e.g. "Om/Hvis du vil, kan jeg hjelpe deg". I mean, are they completely interchangeable? I know om can also mean whether/if, so does using om suggest at alternatives while hvis suggests that it is a yes/no situation? For instance: Om/Hvis du vil, kan vi gå på kino; om suggests that if you don't want it, we could go elsewhere, and hvis is just checking a yes/no condition? Is this correct?