>>513667891
It's the one stupidest aspects in japanese animation. You 'fill' the fornix at the top of the vagina, the cervix is full of mucus of changing types (depending on cycle stage). If she's pre-ovulation then the cervical mucus is stringy and slick, and full of channels for sperma to swim up through (into the cervical folds for standby and up into the uterus). If she's outside the fertile window, her mucus is clumpy/sticky and snotty, blocking the cervical channel.

You can tell baby making lube by getting a finger sample early in foreplay and seeing if it strings like hot cheese between the fingers, or if it behaves more like clumpy snot. I speak from experience from the one half year in my whole life I got consistent pussy (let alone any pussy).

>>513670945
Then quiet quit your civic duties and work toward the overthrow of the united states government (or the spanish regency).