I doubt 'normal' exists, the norm just points toward the general population. I'm 28 and have only had 1 bf, and he was the worst choice a person could make, i probably even felt oblgated to have a r/s with him and for what? Normalcy? Others expectations? Standards? I've been involved with 2 other men, but yeah, only 1 actual bf, and screw normal is what I say. If your situation makes you unhappy, change it, if not, don't fix it if it aint broke.