First of all... I have a curse in the opposite direction. I can often take too long. Sounds cool at first, but it can be a pain in the ass over time. No such thing as a "quickie" for me. I build to orgasm slowly, and just about anything can break that build and I have to restart.
Now for guys who do have trouble coming too fast, have you considered Cialas? For some reason, if I do that 8-12 hours before intercourse, my last-too-long problem is greatly increased. Especially going for orgasm #2... I just grind and grind and sometimes never build even in the face of insane sexual stimulation.