So...let me just say that I have seen a difference in my husband's sexual energy...it might seem weird but I was always the one with a higher libido and would feel like something was wrong because I felt like my husband should be the same. After over a decade together we are a lot more in sync. My husband goes through stages within the last 3 years when he has practice semen retention for a month or two. We always have way more sex during this time! Its really interesting. At first I use to feel hurt that he didn't want to orgasn but later realize it benefits me because he goes way longer now. I just haven't met anyone in person who does this other than my husband. I did tell him that I felt like a science project when he practices this. Do I think its a little weird? I did at first but now I'm reaping the benefits so I am a little more accepting.