In Thailand, it is illegal to leave your house without wearing underwear. When visiting Switzerland, keep in mind that you are not allowed to flush the toilet after 10 p.m. Sweden is one of the countries where prostitution is legal, but strangely enough it is illegal to use the services of a prostitute. There is an interesting law in order to keep Philippine roads free of traffic jams: cars whose license plates end with a 1 or 2 are not allowed on the roads on Monday, 3 or 4 on Tuesday, 5 or 6 on Wednesday, 7 or 8 on Thursday, and 9 or 0 on Friday.