Maybe delve into all of their likes and dislikes? A sub doesn't generally ask her Master what he's interested in as it could be perceived as an invasion of privacy, though she desperately wants to know. Maybe you could reward them with a little insight into Mark? Also, the girls are probably too shy or awkward to find out anything about each other, but with a little push it could get them to open up.<br/><br/>These are just some ideas for some nonsexual situations. :)