"To ask why some women don't have sex with their husbands enough?"
If a wife doesnt want to have sex with their husband then maybe they should lie back and think of England right? I mean its their duty as a wife no?
who the fuck wants that? how odd to be telling other people they should be doing that?
In your experience men don't want firework sex? So they just want a quick shag then , with someone who doesnt really want it. How depressing 
My husband is not one of these men thank god! he respects me as his wife as an equal in our marriage. We dont have "enough" sex we would both like more but there are 3 of us in the family now so its not like before when we could just do it whenever or wherever.
OK , OP have you thought about the many women who have suffered a traumatic birth experience? what if they suffered nightmares, flashbacks, PND, PTSD, a 3rd degree tear that wouldn't heal, Lochia for 3 months. What if they were so traumatise they couldn't go to the doctors from fear of being touched or even use tampax
what if they were scared shitless of getting pregnant again. The thought of having to labour again made them want to vomit. couldn't watch anything birth related on TV, couldn't talk about it without bursting into tears. It took them months to even start to feel slightly "normal" again
Those poor deprived husbands? I doubt they would be wondering why their wife wasn't "making the effort" and to think all those months another woman would have been judging them?