I kind of understand why he would want to attempt it. Its the one division north of 168 that he never held a title. I think he feels that after all the years of hard work and accomplishments, now that hes winding down he just wants to try new stuff before he retires and leave no rock unturned. I always felt that at the end of his light heavyweight reign, he was actually getting bored with boxing and defending his titles. I think hes even said that. Its his career, he was the one who spent years and years of his life in the gym perfecting his craft and busting his ass, so he should do what he wants to do.