I reckon everyone here just does it without thinking about it.
I call my boyfriend "baby", and he does it right back. Sometimes he'll call me "darlin". But those are "ours", kind of reserved for the SO.
Now, he doesn't really call anyone else petnames, but I, on the other hand, do. "Dollface", "love", or "lovey" will usually conclude my sentence when I'm talking to you. I will call you "sweetheart", but watch out when I do that. It's usually out of sarcasm, anger, disgust, or all of the above.
I call my boyfriend "baby", and he does it right back. Sometimes he'll call me "darlin". But those are "ours", kind of reserved for the SO.
Now, he doesn't really call anyone else petnames, but I, on the other hand, do. "Dollface", "love", or "lovey" will usually conclude my sentence when I'm talking to you. I will call you "sweetheart", but watch out when I do that. It's usually out of sarcasm, anger, disgust, or all of the above.