I’m not (and will never be) in any age gap relationship, but one major con is that it prevents other people from dating someone their age. I had two separate instances where a girl admitted she was interested in me but instead chose a much older man for what he could provide. Age gap relationships are unfair mainly to young men because they simply can’t compete with the older men in things like money and time. And if enough men don’t have options to date their age, they will then look for younger women, repeating the cycle.