coitus

1 . This, in turn, has increased their enjoyment of coitus .

继而, 这又增添了他们性交合的乐趣.

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2 . They must, therefore, be inserted 10 to 15 minutes before each coitus .

所以, 每次性交前10-15分钟就必须放入阴道内.

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3 . Their meeting is usually about as a result of coitus .

精卵相遇通常是性交的结果.

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4 . The vagina receives the penis during coitus .

阴道在性交过程中容纳阴茎.

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5 . The intimate contact of the female sex organs during coitus can give both partners great pleasure.

在性交合过程中,男女性器官的密切接触能够给双方带来愉悦.

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