Double aspect in synastry?

What does it mean if an aspect comes up twice in synastry? For example, the Boy and I have mutual trine Venus/Mars. My Venus trine his Mars and his Venus trine my Mars. What does it mean if it comes up twice??

ahh that makes sense actually!

what if it is a double trine between sun and saturn

dwellingonmove - i don't understand what you said at all. expand for me?

his venus is in my 8th house

you can always use google. I did it yesterday.
synastry + 8th + venus

example of pages I found:

Venus 8th house
With Venus in the 8th house, feelings are apt to be very deep-rooted and the emotional reaction to each other in the relation will be very strong, for better or worse. This placement produces a very strong sexual attraction. This is not necessarily a guarantee of permanence, but rather a seductive allure and fascination that yields an especially significant physical combination.

The Eighth House: Transformation & Sexuality

The eighth house is a succedent house. Its natural sign ruler is Scorpio and its natural planetary ruler is Pluto.

Transformation and crisis, our attitude towards crisis and change, sexuality, sex, death and rebirth, personal growth and transformation, regeneration, our partner's resources, addictions, psychology, others' money, taxes, divorce/alimony, inheritance.

also from web:

Sun, venus, and mercury all conjunct in the 8th house shows strong sexual emphasis in the relationship. You both feel at ease with 8th house issues. Venus here can show romantic sexual acts

wow - thanks! that looks pretty awesome.