so what do people think the chances are of a woman having a g-spot orgasm with a penis with 4" girth? What are peoples experiences? I only have a penis of 4" girth and 6" in length and at the age of 19 (I'm 23 now), I'd had a girlfriend the same age for 2 years and after 2 years she finally had a g-spot orgasm and had a few more ejaculating on occasion.