Yeah, I saw that just now. xD 

But then I saw these in the [URL=http://fireemblem.wikia.com/wiki/Pegasus]Pegasus section on the wiki[/URL]

[QUOTE]Male enemy units have been seen riding Pegasi in the third game.

Karin in Thracia 776 says pegasi allowing males to ride them is very rare; either indicating there are exceptions, or referring to the rescue mechanic. [/QUOTE]

I still might have to make edits to my CS to explain why this Pegasus is letting him ride her, though...
Edit: He'll get his mom's Pegasus. That makes sense right?

It would make my life so much easier if guys could become Pegasus Knights. Galeforce for everyone! xD