Double signs in houses

I was wondering if anyone can shine some light into the chart situation where the Mars and Venus are in the same house.
I have Mars and Venus in the eighth house. What on earth does this mean? And how odd is it to have two planets in one house? Seems odd to me.

I literally have some houses that have no planets in them.

Thanks ahead of time!

ok well how do you figure out what they all mean together. I read them separately.
Whats the deal with the degrees?

It's not uncommon to have two or more planets in the same sign or house. Four or more planets in the same sign is called a Stellium, take a look via Google. You should note what degree each planet is in for multiple reasons. If they're within about 10 degrees or less from each other, they're considered Conjunct. A conjunction of two planetary energies signifies that the energies will be blended and work together. Generally a conjunction is considered a positive aspect, but can also be a weak point. If one energy is neglected, so too will the other be.

I have like 3 planets and 2 asteroids in one house all in the 12th.....its a stellium if its more than 3 I think.

I have moon mercury and jupiter and vesta and one more gotta go back and look. But it means that issues and themes from whatever house placed will be major focuses in your life. So im assuming 8th house means sex death love intimacy and then if you apply the functions of mars and venus to that im sure something will make sense in how that relates to your life.