^Ooooops [again]
Re: Mousetheif's comment about one of the gestures in question being the manual letter T in American Sign Language. True. At a world congress of the deaf years ago [the '80s I recall, in Milan] the American manual alphabet was adopted for fingerspelling the roman alphabet except for T for which was substituted the Swedish manual letter T, because the gesture IS construed as rude in all of Europe.
Dennis