My partner does this but not in a sexy, come on way.
He's on a few different platforms and he gets friendly with random women (and some men occasionally) about hobbies and things quite often.
Like today a woman posted a Halloween video with a dog on Twitter and he replied how cute it was. She replied again and he sent back a big paragraph.
Meanwhile, I got 2 sentences out of him today online.
I mean.... we're in our 30s so we're not kids. AIBU to find this behaviour odd? He's made it clear he doesn't cheat in relationships but it makes me feel like he's looking for something extra sometimes