Hi Karl Unless you have a lot of foreskin I would not, two things cause it one is thinking ahead, meaning your you thinking to much of what your going to do and away it goes, so like they say think of anything else why your making love, it should help.
I have a post on here that could help, but you really brave but it does work I know I used it.
Then there is a good section on
www.pegym.com on PE or on
www.Dodsonandross.com left hand side your see Erections, ED and lasting longer, this you may find more fun as it will involve your wife, you both need to be naked in a warm room and some baby oil, try some wine as well to relax you both and just follow what Dr Betty says.
Hope something here helps you both.
NOWHARD