DH suddenly liking the music of a particular female artist. Not a new current artist, someone from the 70s.
Telling me that a particular group of singers are going to be doing a gig locally. When I look at him blankly (because I can't stand their type of music) he says 'you know the (blank blanks) don't you?', I go 'yeah but why are you telling me? I don't like that music do I?!'. He looks away, confused.
The song 'love the one you're with' comes on the radio while driving. At the point that line is sung, he goes 'ha'.
Would you be suspicious?