What are the things that can make errection of penis lastlong?

there are some food that will help but what most men do if the want to stay heard longer is to cut the circulation of so the blood can not drain back out. it works the same as if you cut the circulation from a finger rap a rubber band or string tight and it goes purple. well same thing for a dick. rap a cock ring or string evin so the blood dose not drain and you have a long lasting bonner have fun