>>24302006I guess it's because Ayame didn't have much of a history doing that. Male collabs were rare, they were always as part of a group, and she never organized them herself.
Fubuki and Matsuri continue to collab with males to this day and Subaru was basically the town bicycle back in the day. It also helps that Miko and Subaru are now strictly in the "no males allowed" club.