Right away (low)

You lay back and place it at your entrance, the cool, but not cold, feeling of the rubber sending a shiver through your sex that ricochets up your spine, and then turn it on. A quiet hum emanates from the base, a slight rhythmic tone making it feel like a pulse, maybe even a lover's heartbeat.

It tingles as you rub it up and down the the crease of your lips, making you squirm slightly as the lube it carries becomes even less necessary. Just as you press it inward, a noise escaping your throat without your intention, you feel it make a stronger pulse and launch a rope of its slop into you. You gasp at the sensation, delightfully surprised, and then push it in deeper. The quiet thrum of its innards vibrates gently against your internal walls, a pulse of pleasure.

A few seconds later another larger pulse coincides with an inward push, splashing a wave of your imaginary lover's cum against your innermost recesses, making you moan at the sensation of being bred the way your body wants to be. You pull slowly out and in, out and in, and a few seconds later another slash of fluid fires into you and another wave of pleasure hits, deeply satisfying and toe-curlingly intense.