Choose the right moment
Bring it up outside a moment when your partner might feel obliged to answer immediately. A relaxed conversation leaves more room for discussion.
Talk about the idea instead of imposing a scenario
Say what appeals to you: the costume, humor, changing roles, or the atmosphere. This gives the other person room to suggest their own version.
Start small
An accessory or outfit may be enough. You do not need to define an entire scenario the first time.
Respect a no
A refusal is not a failure. You can look for another activity that you both want to try.
A simple way to talk about it
You can follow four steps: say what appeals to you, ask what interests your partner, define what is off-limits, and choose a very simple first version. This avoids presenting a complete scenario as something that must be accepted all at once.
For example, the interest may be limited to a costume, an atmosphere, or taking on a character. The game can then remain very light, without prepared dialogue or an intimate scenario.
Plan an easy way out
Agree beforehand that either person can stop or change roles. If one of you becomes uncomfortable, the simplest option is to step out of character and return to an ordinary activity. This keeps the game voluntary from beginning to end.
FAQ
How do I know if my partner is interested?
Ask directly and give them the freedom to answer honestly.
Should I buy a costume before talking about it?
No. It is better to discuss the idea before buying anything.