FrankTalk.org

Some guys lose a bit of their erection (some guys more than others) when stopping foreplay
to put on condoms or changing positions (I know, I know, foreplay doesn’t necessarily
need to be interrupted, but it happens anyway); a way round it that I read somewhere,
(can’t remember exactly where) would be for the partner or the guy himself to hold
the base of the penis very tightly (the part nearest to the body) with thumb and index finger
in the manner of a penis/cock ring . That would prevent some of the blood from leaving
and the erection is maintained.
After activity is resumed, pressure can then be relieved at the couple’s discretion.
That pressure can also be applied at anytime during sex.
It worked for me. Please, let me know if it worked for you.
I also posted that at a different forum. Here's the link:

http://www.womens-health.com/boards/sex ... -base.html

I'm not so sure about that technique. I mean, she'd have to hold the base of the penis really tight!

Cock rings are effective but I find them a bit uncomfortable and painful. Moreover, they're difficult to put on. I no longer need them so I don't use them anymore.

Advantages:
Extremely easy to put on,
neither uncomfortable nor painful.
Tight? Well, nothing you can't handle...

The shape of it? It's like the OK sign!!
The middle finger can be on top of the index finger
for added pressure.

I've dont this before...it worked for me.