I grew up on a farm, where there were pigs. I've seen plenty of other pigs mating with pigs So, your answer is "yes, it is possible for a pig to have sexual intercourse with a pig". If you're referring to a human, that is illegal.
Who could predict the thoughts in the mind of married women. Some women wonder what it might be like to fuck some certain guy while others go out of their way to do it. Gone are the days of the man being a serial cheat.