There was an old thread on this. Many causes. But from a punter's p.o.v. it's the bucket fanny that ruins the punt, not the excuses that make it 'o.k.' Worth bearing in mind that some fannies can be a bucket one minute and tight the next. But no, her bucket fanny doesn't suddenly become fuckable cos you use less lube (that only happens when the fanny is over-lubed, a fault some pro$$ies have.