Actually, I've heard that Viagra will cause you to not be able to cum ... like for a long time even.

Jimbo

You should not be thinking about yourself. Make sure that you please your partner first. Try a variety of positions. THen last but least doggie style where she lays flat on her stomach. Drink plenty of water. You have to hit it the proper angle, and things will get super lubcricated, then bingo, bam, bam.

Recommend that you lift weights and do lots of cardo.

...the solution is in your name...

about 45 minutes before the action commences....

take your half a tab(50Mg) of Viagra...followed by (2) 9 ounce
glasses of Vanilla egg cream(seltzer((club soda)),vanilla syrup,and light cream or milk)...(sprinkle some hot red pepper in the first glass)(you'll need the second glass to wash it down)...

not only will you get an initial tremendous belch...but Big Jim will erupt like Mount St. Helens...You'll double your pleasure...for sure

WARNING: Please be sure you are not allergic to any of the above ingredients,have a Dr's prescription for Viagra,
...and of course be sure to warn your partner about the hot "Lava".

Cheers!

AVoid viagra, bad bad idea!  It should only be used if you asre physically unable to get or maintain an erection.

To me it sounds as though you may be handling your friend on your own too much, this will cause decreased sensitivity and retard ejaculation.

Try lecithin.
No joke! Whatever the dosage says on the bottle, double it!
Its completely harmless but it does take a few days to build up in your system though. Once it does, however you'll feel like you going to drown in a sea of your own cum!
Not only will you cum faster but multiples are no problem at all!
The buildup will have the added "benefit" of making you hornier as well. Think blueballs!
You can buy it anywhere - Grocery store, GNC, Walmart etc..

Read the warnings in the package.  Not being able to climax is a known side effect for some people.  I am one of the people who has the problem occasionally.