In quite a few states including California and Nevada it's 18, and it's also 18 if ANYONE crosses a state line to have sex (Federal law). Considering all the fucked up sicko predators out there, I don't think that I could support an age of consent under 16, and 18 definitely sounds like a good idea. In many states there are Romeo and Juliet legal provisions, allowing for a small age difference when someone is otherwise under age. Of course, this applies to America, I'm quite aware that it can go as low as 14 in some parts of Europe, and I have no comment on that since I don't really know how things are done there.
i think people should be able to have sex with whoever they want.. no matter what ages the people are. if you feel comfortable with the person your having relations with go for it. personly i like older guys. and i dont care ages.