I've been dealing with this problem for quite some time now: When I'm having sex, after a while when things start to get really wet, I tend to lose most of the sensation. This happens mostly when my girl is lying on her back with her legs apart. I know the pussy is well opened up like that but in the beginning everything is just fine. I'm currently measuring at 7.48" NBPEL and 8.07" BPEL with a 6.6" MSEG and my head/ glans are considerably smaller in girth than my shaft. I haven't measured this properly but I'd say my head is about 1" smaller in girth than my MSEG. Because of this, I think what's happening is the pussy opens up wider to accommodate my MSEG (also, my penis is quite wide), thus making the pussy a bit too wide to enclose my head/ glans nicely.
To solve this, I can either switch positions, close her legs, or go in as deep as I can which allows me to stroke against her cervix, giving my head a lot of sensation since it's directly rubbing against soft vagina tissue. However, when the loss of sensation occurs, I can no longer orgasm in that way and sometimes I even lose my erection (or at least go back to 70%/ 80%).
I would like to hear ways to solve this, which will probably mean I would like to hear some tips on how to increase my head size, as I understand this will probably be necessary to solve my problem and I was wondering if anybody else has ever experienced something like this, and has successfully solved it? Also, I'm not really looking to increase my EG (well ok, maybe go up to 7" ) but any added length gains would be welcome!