UK - no chance meeting
If you plan to stay in a UK pub and then pick up the nearest beauty, in UK it is not recommended to do that, the law forbids it you may be fined up to 180 euros or three jail months.
USA
Condoms are very rarely used. Thus, catching AIDS becomes very easy. Certain states forbid condoms at all.
Ireland - condoms import is totally forbidden
Gawai
If you have sex with a girl who did not reach the age of 18, her parents may be put to jail
Hungary
In Budapest, you are allowed to make sex only in darkness
Italy
Certain nudist beaches allow only women to be naked, while men are not.
China - don't lok at the legs. Do not ever pay attention on dressed women with her naked legs. This is tough infringements for the Chinese, and you may go to jail.
Estonia - forbidden to play checkers during the act of sex.