Anon here is off work with a bad back - facet joints have locked tight and it's all I can do to sit. Yayness.

Let's give an Assassin a painful back (although I would expect muscular discomfort rather than joint issues in someone as flexible as one of our Assassins - unless you go for old!Ezio) and have their significant other fuss over them, put ice packs or heated sacks of wheat against the offending muscles and give back rubs and attempt cuddles/sexings only to stop every time the Assassin's back twitches.

Magic healing cock is welcome ;-)