User blog comment:B214/Question and Answers 3/@comment-4547267-20140715044108/@comment-1359322-20140715045655

It's not like they can steal the position from Rias, so they can only be after her. Plus to some of the girls, males having harem aren't anything special. They might have seen several of it already, Akeno and Koneko were with the Devils for some time. Rose might have seen some with Odin. Nothing new whatsoever.