This law was overturned in 2008 but at one time, people can only own 2 vibrators or those dildos that look like realistic replicas of a man’s penis. They couldn’t be advertised as as Sex Toy when they were placed on sale; they had to be advertised as a Novelty. Also, only licensed doctors could own more than 2. It also varied from county to county; for example, in Harris County (Houston), you could buy vibrators but not realistic penis dildo replicas. Like I said, the law has changed and you can pretty much buy them anywhere in Texas and own more than 2.

5th Circuit Overturns Texas Sex Toys Ban
Angela K. Brown
The Associated Press
February 14, 2008

The 5th U.S. Circuit Court of Appeals ruled that the Texas law making it illegal to sell or promote obscene devices, punishable by up to two years in jail, violated the Constitution’s 14th Amendment on the right to privacy.

Companies that own Dreamer’s and Le Rouge Boutique, which sell the devices in its Austin, Texas, stores, and the retail distributor Adam & Eve, sued in Austin federal court in 2004 over the constitutionality of the law. They appealed after a federal judge dismissed the suit and said the Constitution did not protect their right to publicly promote such devices.”
http://www.law.com/jsp/article.jsp?id=1202904864073