Guys : is getting regular sex & intimacy a big reason to have a committed relationship?

To a great extent the two go together. If you feel real intimacy and have regular sex you are probably in a relationship that is reasonably committed. Certainly there are good reasons to try to limit sexual activities outside a relationship if only for health reasons. If either partner is having regular sexual contact with others then he/she might pick up STDs and pass it on. Uggghhhh. But feelings of intimacy usually come with feelings of commitement. Good idea to have a discussion about this with your significant other.