Are you sure?  The advanced study is something you should seriously consider.  First, it is fun!  Second, the time commitment on each segment is much shorter.  Third, you complete each segment on your schedule.  Fourth, why not keep the joy of sex towards the front of your mind?  Your spouse is bound to appreciate your continued engagement of all things sexual.  This advanced study contains all the fun benefits of the previous studies (actually, much more fun!) with a much less imposing time commitment per segment.  Hopefully, you’ll reconsider and find a good use for $900 and some gifts.

Yes, I’ll participate for $900 and some gifts knowing this anonymous study will be less time consuming per segment than the previous study.

No, thanks.  I’ll still decline.