Medium level
Task for the man
Find a smooth, flat surface, such as a table, and tie your girl to it. You can use whatever is handy, such as a belt or tie. The main thing is to keep her from moving. Start teasing her body with kisses or touches. Have her stay in this position until the next task that cannot be done while she is tied up.
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Medium level
Task for the man
Your girl won't like this task, but it's worth it. Your task is to bring her to the edge by any means without letting her come. You can do this several times in a row, and you'd better tie her up so she has no chance to get free and fuck you herself.
Medium level
Task for the woman
Sit on a chair. He ties your hands behind you and your legs to the chair legs. You're available for his caresses for 5 minutes.
Medium level
Task for the woman
He ties you standing in a star shape, arms up and out to the sides, legs wider than shoulder-width. You are in your underwear. He is allowed absolutely everything except penetrating your intimate parts or mouth with his cock. He has 10 minutes.