Once common throughout much of western North America, the grizzly bear species currently reside in five separate populations in western Canada, Alaska, Wyoming, Montana, Idaho and Washington; and there are around 30,000 bears in Alaska.
A rebound can last forever or a week. It completely depends. If you are already looking at the relationship as a rebound then it should end soon. You will not last with a person you feel is nothing more than a rebound to you.
the best answer i can give you is that good sex lasts for however long the people who are doing it want it to last for if you only have time for a quickie then three minute sex is perfect if you re on vacation and you ve got nothing but time spending all night having different kinds of sex may be what s idealnswer so for starters we need to distinguish between the question how long does sex usually last for and how long should it last for the first question might be answerable by turning to research