Make an invitation that is clear, pressure-free and genuinely easy to decline.
Ask, do not stage a surprise
Raise the subject before buying an outfit for your partner or introducing it during sex. Explain why the idea appeals to you and ask how they feel about it. A gift that carries an unspoken obligation is not really a gift.
Make no the easy answer
Say directly that refusal will not change your affection or create an argument. Then demonstrate that promise. Do not repeatedly ask, sulk, compare them with previous partners or frame participation as proof of love.
If they are curious, centre their comfort
Let them choose the style, coverage, colour and setting. Share the cost, learn correct care and agree whether photographs are allowed. Begin with a manageable piece and stop if they feel physically or emotionally uncomfortable.
Keep appreciation human
Compliment your partner, not only the garment or the fulfilment of your fantasy. Check in afterwards and accept that they may enjoy it once, often or not again. Enthusiasm is meaningful precisely because it is freely given.