2. Are swirls only for F-16's or do F15, Tornado, ect.. pilots also have their own swirls?
The answer to question 2 is the swirls is a term specific to the F-16 depending on nation as US operators us the generic stars & strips variant.
F-15 crews have a different style of patch which is sort of like the swirl. 2 distinct styles depending on which F-15 version flown. Scans enclosed below for 'C/D' & 'E' models.
The 'C' crews are more creative as can be seen in the Vampire Driver patch. This is likely to be a Friday patch where as the the 'Grim Reaper' style could be classed more the normal day to day usage type.
Not aware of any thing for Tornado crews as such.