You may not be comfortable with this one, and that would be fine. I did one of these clips and it was pretty popular for me. Basically I had the model face down, arms straight overhead tied tightly. I started smacking her butt, softly at first and getting harder (but not too hard). When it stung too much the model has to yell ‘Tickle ME’. Then switch to tickling armpits, hips, ribs. Tickle aggressively to get a good reaction. When the tickling is too much the model has to yell ‘Smack ME’. Then you keep switching back and forth depending on what the ticklee can take. The goal is to have a pretty good balance between the two.. and maybe the person being tickled hates being smacked so much that they endure some tough tickling.