Hi, I am 35 yrs old male from India. I am married since 2005 and had a good sex life till last year. Since Nov 2012, I am having difficulty getting erection. Even when I get, it is not strong enough to penetrate. Sometimes, I lose the strength during the foreplay. Also, I feel weak throughout the day and do not have the energy or aggression that I had just a year back. Not sure which doctor should I consult for this problem in US. Is there a quick remedy? I read all these could be problems with low Testosterone, how to increase it?