Sex is the same in any country worldwide but if you are talking about specifically sex in the US, then it is simply sex in any of the 50 states within it's borders. This could be anything like man to woman, man to man, woman to woman, cat to cat, dog to dog, you hopefully get the idea.
No, there is no mention of sex in the US Constitution.
The US release date for Sex and the City: The Movie is May 30, 2008 (US).
Same-sex marriage is legal in all 50 US states.
The legal age to have sex in the US is typically 18 years old, although it can vary by state.
If you have sex If you have sex If you have sex
Sex
sex
one sex (bacteria) & two sex (us).
If by "illegal" you mean "against the law," then none. There is no state in the US where same-sex marriage is considered a crime. In fact, in most US states, same-sex marriage is legally recognized. (See related questions below: "What US states have legalized same-sex marriage" and "What US states have banned same-sex marriage.")
Yes. As of November 19, 2014, 35 US states recognize same-sex marriages and only 15 US states do not.
Effective June 26, 2015, no US state or territory may ban same-sex marriage.
Same-sex marriage is legal in the US Virgin Islands effective June 26, 2015.