I have a 1:1 pair together, with a third lady in quarantine.
When I first put the pair together, the female harrased the male for 3-4 days by ramming her shell into his and chasing him around sometimes.
A month later, tables have turned, I am happy to say my male has started to nibble on my girls feet and shell a little, not bites just nibbles. He sniffs her face and climbs half onto her back, to have her knock him off... I am hoping for copulation, however am doubtfull Iwill get eggs this year, hopefully next when I have a 1:2 ratio.