Well let me put it this way: it can get very, very dull or very, very nice, it all depends. For instance, i'm engaged to my girlfriend of 8 years, our sex life has been active for a long time but has it ever gotten to be outright annoying/boring/negative in any way? The answer is yes, but it also has been very fun/enjoyable/positive in many ways as well. It honestly has it's ups and downs, one of the most common issues I think in couples is simply one person just doesn't want to do it while the other does. It really isn't something to rip your hair out about. And quite frankly, virginity these days literally means nothing. If you kept it, cool; just means your first time is a bit more romantic. If you lost it, cool; just means you know what you're doing, it really just doesn't matter.