DH and I go through phases.
We have been together for almost 9 years and married 5 years (tomorrow is our anniversary.) At times, sex can be most nights, other times it can be weeks without anything. 99% of the time, it's shit! 
So I am going to be nosey and dig.
How many of you are satisfied with your sex life? How often is enough for you?
Please don't reply if you're not comfortable answering. 