<human>: I think my boyfriend and I mis-matched libidos, I want sex 3-4 times a week, but he seems happy with once every week or two. I know he masturbates to porn ~3 times a week, so I'm not sure if "mis-matched libidos" is the right term, but he definitely wants real-life sex less than I do. This leads to him rejecting me a lot, which feels pretty terrible. 

It also means that when we do have sex it doesn't last very long b/c it's been so long since the last time. The only way I can finish that fast is if we're in missionary, so essentially our sex life has turned into ten mins of missionary every week or two. We used to (ie. for the first two years of our relationship) do lots of different positions and have sex ~3 times a week. 

Basically I am dissatisfied, but I don't know how to bring it up to him without making him feel emasculated or hurting his ego. His natural response to being hurt is getting defensive, so I need a way to tell let him know that I want him to put more into our sex life without having him shutdown. I also don't want him to feel like having sex is an obligation he has to carry out.

How would you want to your partner to break it to you that they want more/better sex? How can I make him understand how important this is to me and how bad I feel when he turns me down? Should I be concerned that he still masturbates a few times a week but seem disinterested in real-life sex?

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: The quantity and quality of sex has gone downhill, my boyfriend is less interested in sex than I am. How do I tell him I want to have more/better sex without hurting his ego?