I know what you mean, but I feel like it is still assuming the other person’s responsibility by allowing them to project their vulnerability onto me. I was thinking of some thing along the lines of:
"I am feeling healthy, happy and in love with you, I will want to have sex with you on a regular basis. I could either minimize one of these factors and thus limit my sexual feelings toward you, or you could just own up to struggling with some issue today that is limiting your sexual feelings toward me. Which one do you prefer?"