Tournament Scrabble uses special tiles that are one-sided and smooth (
www.protiles.net) so you can't try the old flip a tile over trick that some try with wooden tiles.
And, there is a rule about orientation of tiles, but that has nothing to do with sex, so most people probably wouldn't be interested.
Seattle Scrabble club meets Tuesday nights, if you are interested:
www.seattlescrabble.org