I have 2 bolivian rams, 1 I know is a male but I have one that's way bigger (I got them at the same time)and not 100% sure what it is, but looks like a female. I used to see them lip-locking often, now they do it less but still do, and sometimes I see the confirmed male peck the unsexed one. So my question are, do male and female bolivian rams lip-lock, or is it only males? Also is this breeding behavior?

Thanks, seb's fish