Girl - I can think of alot to do but most is NOT G rated -
I was going to say one of those all night 'hot tub' things but I remembered your b/f is a clean freak - I seriously doubt he'd want to do something like that - the massages sound REALLY good and you both get something out of that...
hint hint
the other thing that came to mind is you can rent some airtime - most all Flight schools/charter companies offer time in the air via Gift Certificate - where YOU can even take the controls - it's more affordable than you'd think - you could probably do 1/2 hour for under or around $100