Posible realization what they are going to get involved in? Relationship, arrrrrrghhh ! panic, Marriage aaaaargggh panic, Kids aaaaarggh Paniic. the moans and groans of every day life, aaaaargh, panic, commitment, AAAAAAAAAAAAAAAAAAAAAAGHHHHHHHH HELP HyperVentulating panic. Also its down to compromize, Some woman wnat more than what a man can give, and VISA VERSA. The thought of trying to keep up with womens high demands. And VICE VERSA.
At the end of the day. Man and women think they can go it alone in there relationships without God in the middle. Hence why a good majority of marriages fail. what ever way you look at it. the truth is there, no God in the middle of any relationship. No real success in longer marriages.
Perhaps why men, and Women disappear, all those thoughts combined has hit him like a ton of bricks. Same goes for women too.