posted January 11, 2016 07:03 AM
I have never heard anyone say that before, so I would guess it's a quirk of whomever is reading the chart . It also sounds a little hokey to me. More like tarot stuff.
Generally, chart readings are about potentials and energy within the chart. So there's not really an 'if - then' kind of scenario with that. It's just how your energy may mingle with another person's (when discussing synastry or composite).
That being said, if a relationship or interaction is already in place, (like, you've met someone you're into and know his/her birth details to run a chart), you CAN see how connected the two of you can be from that. 'Union' possibilities can be shown in AC/MC/DC/IC line ups, or Venus conjunctions, or moon/moon conjunctions - there are literally thousands of threads on 'union' type energy.