I think anyone in a sex-starved marriage who is considering having an affair should consider doing the opposite and encourage their spouse to have an affair. I don't mean suggesting having an open marriage. I mean actually recognizing the fact that whether LD or HD your spouse is in some way just as frustrated with your sexual relationship as you and doing them the favor of giving them the option of looking elsewhere for fulfillment. Consider how unfused that would be. I'm not suggesting the reality as an option that would be successful just that inhabiting the mental/emotional state that you would have to achieve in order to make such a suggestion might be helpful.
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver