An analogy on parrellel lines

2 very cautious people are like parrellel lines that never cross. Because both don't seem to want to step beyond the boundaries - could be fear or comfort of being on their own line that each just remain treading on their own line...

Should the lines even cross???Or rather, will the lines ever cross??? Perhaps only when one person takes a step to tread beyond the line...otherwise, the 2 parrellel lines will always remain with the same distance in between...