What percentage of the time can you fully penitrate (balls deep) while having vaginal sex? With my wife I used to be able penitrate maybe 70-80% of the time with out her becoming uncomfortable. Now it seems to be lower than 50%-maybe 40% or so. She had a child 9mo ago, but recovered very well and very quickly. I don't think we pushed it too far too fast and she seems back to normal now. I am quite large all around ( a solid 8 1/2 x 6 or so) but we use lots of lube and always prepare with plenty of forplay. Just curious what normal is.