Everybody's body chemistry is different. I used to want to fuck anything that moved in my 20's, 30's, 40's, but now it's really slowed down. 53, I don't take anything other than vitamin D3, B12, and smoke almost every day. Interesting tho.. Paige had all her lady parts taken out about 3 years ago, and they still can't stabilize her testosterone. One month it's 10, next month it's hit as high as 3,655, although she could bench press 465 lbs (just kidding)... but it's been a battle to stabilize it. She smokes or does RSO every day, more than me anyways. I can tell when her T is gettin up there cuz she's horny as fuck. So.. I don't know how much science is behind this. It's an ongoing mystery.