When my ex and I loved each other, we'd do that. A bedtime thing. Nothing spoken, one of us would start jerking off. And if the other wanted to get involved, that was OK. And if not, just as OK. Whichever of us was killing angels would finish our filthy business and wipe the juice on the others back. Just one finger, a simple line. It was very...intimate.

Come to think of it, when we stopped being in love, I kept doing the wiping. It was intimate too, but more a Vern Schillinger/ Tobias Beecher type of intimacy.
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Having killed someone doesn't make you a killer- @KINGROCHE