I need some help.

I've been with my captain for almost 4 years and sex has become an issue.

He is bored with what we do. At the same time we don't do it very often and he is incredibly selfish when it comes to sex.

Every time we have sex it's like having sex for the first time, it's always a bit awkward, a bit clumsy. He knows what he likes to be able to get off but he won't vocalise it but if I change something he gets annoyed because I've either spoken and that's not allowed or I've changed the flow and he has to get back into the moment.

Any tips on how to make it more exciting? I thought about dominating him a little (blind folds and ties etc), but he is the Captain and I'm not sure he would appreciate that.

Help!