Half-man half-orc men

The origonal question was HOW did the orcs and men breed, correct? Well, since we're all throwing our own little opinions in, I may as well, as I have many of them. :P

1) In my imagination, Saruman used his wizardry to trick the women into believing the orcs were men (either their husbands or just men whom they would know) and led them on to impregnate the women as well who in turn gave birth to orc/men.

2) Contradicting idea #1 goes the facts that Saruman wouldn't have time to do this, and it wouldn't sufficiently create an army of orc-men, so instead of physically breeding orc and man, he did indeed cast some spell upon orc and men to where their bodies intertwined and mixed together forming one being of and evil orc-man.