I know I am late to this but... http://www.tantra.org/ MMO has nothing to do with actual ejaculation but the sensation of orgazm without ejaculation numerous times before you actually DO shoot your load. When you finally do let it go - look out! I almost past out the first time not knowing...
I'll add to this idea and get your woman to tickle your hole with her tongue while your strokin it (make sure its VERY clean). Guys' holes are one of our erogenous zones. Take some time and read some on Tantric sex at tantra.org it is some amazing stuff but you have to be very open minded to...