I do agree with u that for a virgin and a woman who has not given birth before, her passage is quite tight. In that case, she needs more time and stimulation to help her passage stretched. Another possible reason for her resistance is she feels tensed thus resulting in the muscles clamping up.

For a old birdie who has given birth before or who has some years of sexual experience, a bigger load inside her cavity will difinitely make her feel more fullfilled.

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