Can men be in love with two women?

What does it mean to be 'in love'? Is 'in love' the initial rush of loving a person in a relationship which ultimately settles in a deeper love? I know of a situation where one man is 'in love' with a woman and 'loves' another women and is in a full relationship with both! The one he 'loves' he has known for a number of years and the one he is 'in love' with is a new relationship, but he wants to keep both on the go. The older relationship knows about the new woman but the new woman does not know about the older relationship! (she thinks he is just 'friends' with this woman!) I guess the answer to this question might be that a man cannot be 'in love' with two women, but is perfectly capable of loving two at the same time but with different intensity. I doubt, however, whether he gets the best out of either relationship and certainly not from the woman who knows the whole story. Incidently the one he is 'in love' with plays hard to get a lot of the time, which I guess keeps him very interested!! Also this man has kept his former relationship alive and well by consistently lying about the other woman saying it's over, we're just friends etc etc, however from the amount of time they spend together and the phone calls and texts this simply is not the case!!