Women and their mothers

One of my friends (a girl) told me that, in her opinion, if a guy talks to his mother on the phone once a day - every two days, it is an red flag. And she told me that it's not in some kind of bait way, she really think so and says that she's not the only one. I know that many women have difficult relationships with their mothers, I watched The Autumn Sonata lol, but I just don't understand how they feel about it and why they find it strange. When I asked her why, she told me that 1)women don't do that at all and 2) This makes her feel that the guy doesn't need a relationship because there is a woman in his life that he loves and with whom he spends a lot of time (10 minutes on the phone like I said). So it's just pure jealousy? Is that all? I just needed to put it somewhere, it feels so weird.