It may not be customary to greet a dear friend with a kiss. But Foxy made it a habit of doing so. After all, he loved to show his affection and adoration towards his important friends. He wanted to know that his friends are all precious for him.
Of course, kisses is not the only way for him to show his adoration. But before he could secure a nice, hidden place all for himself and his friend, a kiss would have to suffice.