The bible expects you to be the perfect human being who thinks of others more than themselves, which is nearly impossible.
The bible forbids you to have lust, but it's not like it can stop you from staring at them foxy ladies.
Actually (note that I'm not Christian)
The bible touches on many sources of sin.
But the one thing that the bible shows that is the only ticket to heaven in the Christian religion is to have the faith in Jesus Christ and to accept him as your "Lord and Savior"
In order to reserve that ticket you must ask for forgiveness through prayer.
So you can break the 7 deadly sins time and time again but in Christianity you must ask for forgiveness.
Actually, the first four commandments are to honour and to keep our focus on God. Please do respect that.
On topic:
The only reason why lust is a sin is to keep us away from the temptations. So in general, I guess lust is just a big no no.
the bold.