This is way more difficult a request than I'd realised it would be — it's kind of hard to think of things aimed at adults, or even teens, that don't have quite a lot of romance and/or sex in them.
Someone mentioned Doctor Who, but the last episode of that I watched had a scene where one of the companions is pissed off at getting cockblocked (well, the female equivalent) by the Pope, and a scene where the Doctor encourages her to call the woman who (in another reality) had been scared off, telling her that she's not out of her league.
Father Brown doesn't have much sex or romance, I don't think, though there are relationship-based mysteries in them — but to be honest our media is so saturated with sex and romance, it's easy not to notice or remember it.
I don't remember much romance in One Foot In The Grave?