Random thought..

In the Horoscope the 6 house gives both Positive and Negative results..it's Upchaya ( growth) house and Dussthan.In Nadi this house is identified as house PRARABDA... being house of Karma (10) of Past life ( 9)..hence you get Unalterable good and bad results.

If anyone having their Lagna 6 from your lagna that person may benefit you or bring troubles to you..

Ex.. For Aries lagna..Virgo Lagna person may bring both good and bad effects.

In the same way if your lagna is 6 from another person's lagna then you can be instrumental in good or bad results for that person.

Ex. Aries will be 6 to Scropio,.

All these to Prarabda Karma..

My note.. please check .This may be the reason that 6/8 matching is avoided..

Courtesy

Prof Av Sundaram