There are times when foreplay is all I want, there are times I have no time for foreplay....
Well in my opinion there isn't. I love foreplay and would only have sex once I could hold back no longer. My wife sees it differently. She likes some foreplay but wants **** inside her way before I'd like to give it to her. We usually compromise and I give in before she becomes aggressive.
In the case of men, Yes, The technical term for too much foreplay is 'Blue Balls'
It is good but after three hours I run out of ideas and need the main event.
Once it runs for three days that is perhaps to much with doing the actual act.
Only before fore play.