Who in the heck assigned the avatars under the new forum software? When I logged in just now I was confronted with some chick massaging her chest, which is certainly not (a) anything I picked and (b) worksafe at my office.
Quite a shock, and took way to long to figure out how to get rid of it when the boss could walk by at any time.
Just an FYI - better to leave the default blank than try to make it amusing. You never know what the real consequences of "a little humor" can be for people.