As you can tell by the responses so far, there is no one correct answer other than being very open and upfront about it. Something I might also recommend is dating older men. In many men, the sex drive falls off a cliff after a certain age to where he might not mind scheduled sex, but you still need to show physical warmth and intimacy. Also, if you put yourself on a schedule to initiate sex, he might not even catch on because sex isn’t as big a driver as is once was.

Please don’t take this as anything but yet another different answer to a question with many different answers.