A recent article talked about reasons why wives shouldn't give their husbands more sex because it's meant to be enjoyed by couples not a duty to be performed by one partner.
That aside, there may be barriers preventing you from enjoying sex and loads of intimacy with your husband such that you may have a hard time remembering that sex is about you too.
Gaye Christmus of BlogHer lists 4 barriers preventing you from sex and intimacy with your partner and ways to overcome them: