Orgasm for conception?

Is it true a woman must orgasm first in order for the sperm to travel faster and conceive quicker? I heard somewhere that the PH levels in our fluids change when we orgasm and that it helps you get pregnant easier. Im kind of an oven, wish I was a microwave who can cum faster, but even if I cant get climax from penetration, can I just orgasm by getting fingered and then have him go next? Will this still boost my chances?