Men can just lie if they want to about any and everything they feel like.
Lie is very common used by both gender just to achieve something.
A simple truth is that insufficiency of understanding between both man and woman.. this leads a man to lie. A man feels if the truth is opened it will not be understood by others especially spouse or girl friend. but it's just an inefficiency to explain his state to the girl.
Men generally lie to satisfy the loved ones and see them happy always.
my experience says that most men lie to avoid confrontation. women love to nag and men try to avoid nagging. so they think it is better to lie and get out of a situation, rather than listen to a complaining lecture.
Apart from this, men lie about how a girl/women looks (when asked). They lie about other girls they meet or know. They lie about time spent online. They lie about their income also.
It is the inbuilt nature of gals to lie. Gals lie of their age, relationship and everything under the sky. If I m wrong ask any gal. I m pretty sure that she won’t divulge her age ask her waist size she will lie. This is the inherent property of gals to ilea and not with boys.