她一次又一次地把我的龟头放在一个洞里，直到我不得不射精。

Have you ever let your mistress fuck you with an onahole? In contrast to masturbation with an onahole, this is particularly exciting because you never know which grip she will use in the next second. So it really is almost as if the cock is actually in a real pussy. The whole in and out is really horny.