Tickled on St. Andrew's cross

The slave is fixed in place and has no chance to run away. I tickle him mercilessly! It's just so much fun when the slave simply has no more control over his physical reactions and just the sight of my hands makes everything in him twitch. His upper body is already all red and he can hardly breathe. I love to fuck him up like this! Pure stress for the slave's body - great fun for the mistress!