Silberberg A, Adler N
Science. 1974 Jul 26;185(4148):374-6. doi: 10.1126/science.185.4148.374.
Copulating male rats were permitted a maximum of seven intromissions in which to ejaculate. This experimental constraint of the male rat's sexual behavior produced an increase in the number of sessions in which the male ejaculated before the seventh intromrission. This species-specific behavior pattern is therefore susceptible to environmental conditioning.
让正在交配的雄性大鼠最多进行七次插入动作以射精。对雄性大鼠性行为的这种实验性限制导致雄性在第七次插入动作之前射精的次数增加。因此，这种特定物种的行为模式易受环境条件的影响。
