The monster of all monsters is "The Mama's Boy." At least, that's what professional matchmaker Trombetti had to say from her experience working with couples. And let's be real, anyone who has been in a relationship with someone like this knows how awful it can be. To be clear, it's not bad for a man or woman to love or interact with their mother, but it is when the bond is a little too strong; one can even say aggressive. 

"The worst way [to interfere] is when they're a mama's boy and the mom is just competing with the girlfriend," Trombetti said. "When you're the girl and [his] mom's interfering, she wants to be the confidant to him. Instead of encouraging him to go to you and build that relationship... she sees you as a threat." 

When the mom interferes to this extent, it's not only intrusive but it's majorly creepy. "I've seen mothers that I think if they could crawl in bed and have sex with their son they would," Trombetti stated. "It's ridiculous, they're so competitive." And it isn't just reserved for men and their mothers. This kind of over-involvement and over-attachment can also happen with women and their fathers. The result is a weird and angering experience that will eventually break up the relationship.