Uniforms/Costumes – This overlaps with roleplay

The actual outfit itself can be a turn-on. Classic ones: schoolgirl outfit, nurse uniform, police officer, maid costume, military uniform, etc. The clothing helps both get into the scenario (and many find the look itself sexy). If one of you has a thing for, say, men in suits or women in lingerie and high heels, lean into that – dress up accordingly and let them ogle.