What do you make of my colleague TSR?

Good morning TSR!
Well I've been at my bar job for about 7 weeks now. It's a well known (infamous!!) pub chain and the atmosphere between staff is very bantery and relaxed. I have a laugh with most staff members and sometimes it is quite flirty. With one of my colleagues who is a tiny bit older than me, we haven't clicked and whilst sometimes we have a bit of small talk it's quite cold and clinical. Bearing this in mind, I found it so odd when on a busy shift completely out of the blue, he says, 'can I ask you something'. I said yes and he said, 'how many boyfriends have you had?' I replied with 'none. Why?'. He said, 'if they cheated on you what would you do?' I said I would chuck them. He then complained how it was 'pissing him off'. It sounds like a pretty mundane conversation but it just struck me as weird that we barely speak and he asks me (there are other female staff). Sooo I was curious so I asked if it was a friend who was being cheated on. He then told me it was another colleague. I asked, half joking if he fancied her. He wasn't too keen. He then told me about the whole situation including how she'd been cheated on numerous times and how she has developed strong feelings for him.
I usually try not to over analyse the interactions I have with the opposite sex, but the fact that he asked me out of the blue, told me something private which a colleague had confided in him suggests to me that maybe just maybe he was trying to make himself sound desirable or even less likely, mAke me jealous?
Could I have your opinions on this interaction please? Don't be too harsh guys!!!