I have been watching The Slap online which has lots of portrayals of sex between married/long standing couples. I was actually a bit shocked that the sex was almost uniformly portrayed as 20 seconds kissing, penetration or bj and thats it. I can't see how that would be satisfying to many women - although I appreciate it may be to a few.
AIBU to think that in rl straight married sex is usually not like this. I am a lesbian, so I don't actually know - I guess I hope it is not an accurate portrayal.