Hey Dude! Is this right or wrong

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Yester day I was alone at my home with my girld friend. Were enjoing the time with a fear of some one could get in any time,As long as 2 hrs we enjoyed the forplay only from 8pm to 10pm and we got to know that some one coming inside and then we stopped it.and got relaxed.So i want to know from that does it has any bad effect on me or on the girl,due to long forplay and not getting the satisfaction completely having an entercourse.plz advice..