That's handy, then! A sizable chunk, and just one scene, seems like it'd be easier to separate than five sex scenes scattered all through a longfic, or one scene centrally placed in a shortfic that would need a new transition written to replace it.

I'm not savvy enough in AO3 or coding to know for sure, but maybe there's a way to code it as 'make this the background colour' rather than 'make it white, which I hope is the background colour'?

Glad you figured out a way to let your friend in on the fun. :D