Partener experiencing pregnancy symptoms?

I have noticed that since I've conceived, my fiancé is always fatigued and has also been really bitchy. Where as before I conceived he wasn't this way. Could it be that he is feeling the pregnancy symptoms as well? I've seen other couples who were pregnant, where it seems the father is taking on some pregnancy symptoms as well. Like, one couple I knew, the father gained all the weight and the only weight the mother gained was all baby and fluid. Do any other couples have experiences where the father is getting pregnancy symptoms as well as the mother?