I shall refrain from common frustrations like career or traffic.
The frustration which baffles young men especially, is ability to focus their attention on a particular women!
Be it your lover,girl friend or dream girl, we are constantly challenged by more better choices every where.Men find it extremely difficult to stop falling in love with every second women they see, any where if she is attractive and healthy.
Yes this is a momentary impulsive act but still we are guilty of it. Yes it is extremely frustrating as we are so much so vulnerable.
PS : Nothing immoral here as men are genetically programmed for this.Girls know this and hence they make every prospect of theirs invest considerably emotionally before moving forward in ais a unsaid code between women.They will make you wait, test you and frustrate you more than all the women combined of those micro attractions, and hence say yes.
Now you know why all the drama is their in any relationship.