Planning a Baby  Discussion Forum

Hi,
Ok it sounds funny but here it goes !
I am married and trying to have babies with my wife.We are doing intercourse(2-3 times a week) and I am ejaculating enough,but I doubt I am able to do it the right way.I get the full erection and stiffness in my penis but when it comes to penetration I could hardly insert 10-20 of it inside my partner and with subsequent try it gets loosen up and non stiff.
I have read on this site that the vaginal duct is too small to have any penis,finger or tampoon but stretch enough to deliver the babies.
I wanted to know :
(1) To which extent the penis going inside is considered success-full penetration
(2) Is it hygenic or safe to stretch the vaginal duct with hands or fingers or any other thing to loosen the vaginal stiffness so that more of penis can go inside.
(3) Is it safe to use any medicines or lubrication for both female and male - Though I would least prefer it.

Inability to insert fully result in a very funny situations rather than being tensed.
plz advice or put useful comments !!
Thanks in advance !
Rgds,
Rp sneha replied. there is no need to losen up vaginal duct you will not get pleasure if u do so. full p....s can be inserted without it. use lubricants and full p...s can go inside.