The first time two persons do sex can be amazing if there is great expectation and
build up but can similarly be a total tragedy because of that same expectation and build up. Often it is the latter. It takes time to get to know each other in bed so lower your expectations and never base the quality of sex on that very first time. Things can change and get a whole lot better. This is where your communication skills will be at their most important. Often we expect partners to read our minds and know exactly what will make us respond and feel good. It's not fair to put those sorts of expectations on another person, particularly since he or she can't possibly live up to them. If you've waited to sleep together, have built some trust and mutual admiration, your first time together may not be fireworks, but it should be warm and satisfying nonetheless.