Penis of man deflates and becomes small after one orgasm and reaches to flaccid state. To continue sex and to go for 2nd orgasm man needs 2nd arousal and hardon to continue the intercourse. Practically man's penis gets pushed out of female vagina after orgasm due penis shrinkage. Some can get 2nd arousal very quickly and many others will take few hours to get reactivated for 2nd sex. The inbetween period of orgasm and 2nd erection is called latent period which is variable among each man. Okay?