Performance art night

Incorporate an element of performance or exhibition just between the two of you. For example, one does a striptease or dance for the other as an “audience,” or you take turns posing and being worshipped (like a life drawing class without the drawing). You could even film each other (with consent and to delete later) to add a camera element. The focus is on one partner performing and the other appreciating, then possibly switching – it can build confidence and a different kind of thrill.