RE:Lights??
So one of you wants lights on and the other lights off. Simple, blindfold the one who wants lights on. They can be an exhibitionist whilst their (lights off) partner can hide from view. I wonder why (s)he would want to if they are a nudist.
And for group sex there are plusses either way. Lights on gives the perk of voyeurism - of everyone seeing the reaction as someone comes to orgasm as well as (one, or two, persons ) feeling it. Lights off gives mystery. Who are you playing with, who is playing with you and how many?
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