Best position to “shorten” the length of the vagina?
There’s a position at this link that works very well. It’s got a Christian -friendly diagram. You can also try it using pillows to elevate your hips, and/or with your husband kneeling over you on the bed. It is a very deep position – I recommend using the restroom prior and asking your husband to take it slowly until you see how your body reacts to it. It can be painful for you if precautions aren’t taken.
If you haven’t already found it, Christian Friendly Sex Positions has a section dedicated to deep penetration positions here:
If you mostly make love in missionary type positions, then some of their suggested tweaks might help.
Woman on top positions generally allow more clitoral stimulation, whilst rear entry will generally stimulate the posterior wall of the vagina. Stimulating a different spot might help you to reach orgasm more easily – I believe that some women also prefer the control they have in woman on top positions.