birth control

Scientists are beginning tests to see if ultrasound can be used as a reversible contraceptive

for men.

Based on early work, University of North Carolina experts believe a blast of ultrasound to the testes can safely stop sperm production for six months.

With a grant of $100,000 from the Bill & Melinda Gates Foundation they will push ahead with more clinical trials.

The researchers ultimately hope it could offer a new birth control option to couples throughout the world.

I'm in need of your wide learning.

A few months ago I was reading Steven Rhoads's Taking Sex Differences Seriously. Somewhere in passing (meaning in just a couple of lines) he says that boys who buy condoms rather than rely on free sources were much more consistent and correct in their use.

I have lost track of my notes and having looked though the book twice it seems this is a needle hiding in a gray rug. A try at google regular and g. scholar doesn't quite return what I'm seeking. I suspect I'm not getting the search terms right.

Hi, I'm a gnostic student from Mexico and I'm going to order this book for me and my girlfriend. I'm familiar with the teachings in it and I have some questions:

For the gnostic standpoint, birth control pills are bad for the spiritual work, I don't know if they interfer to some extent to the flow of energies. I have experienced normal sex and I know about the hangover and detachment feelings which I no longer want in my life. However I don't know when I'm going to marry my girlfriend and she is curious about trying this method but is afraid of getting pregnant.

I'm creating this forum in response to gustavo andradne's comment: "Vasectomy could also be something unnecessary if one is in a relationship where it is OK to be inside her only during non-fertile days.. Maybe rhythm/'standard days' in combination with non-orgasmic copulation should lower the probabilities of pregnancy enough to be considered 'safe sex.'"

In this context I assume he's meaning safe sex in the sense of protection from pregnancy, not STD's.

I wonder what are the views of the people who visit this forum on vasectomy.
I see it as something that might subtract some pressure from lovemaking. So another question would be: How does that pressure come into being?

Vasectomy could also be something unnecessary if one is in a relationship where it is OK to be inside her only during non-fertile days.. Maybe rhythm/"standard days" in combination with non-orgasmic copulation should lower the probabilities of pregnancy enough to be considered "safe sex."

Another question would be:

A person has sex twice within a half hour, and the male achieves orgasm both times. Is the sperm fertile the second time he achieves orgasm??? Write ASAP Please!!!

Greetings and thanks for this site and all the work that has been done to get this very valuable info out.
I am the co-author of the book CONSCIOUS CONCEPTION, and have considerable knowledge and experience on the subject, but greatly appreciate the new scientific work that is being done with evolutionary biology and neurochemistry.
In my experience, there are at least three tangents to this work that I would like to see being investigated more, or if already there is research would like to know about it..