i couldn't really talk about sex at all with my first "real" (as in proper intercoursal relationship etc) boyfriend James... i mean i could talk dirty while we were having sex --- but i couldn't discuss anything properly. for example when i found something extremely painful i would minimise it totally (saying "mmm a little uncomfortable") and if some of his actions i didn't like them i was too embarrassed to say and just 'endured' them - kind of wriggling around to try to make it less uncomfortable or try to subtly move him onto a different area --- and i never once could say how much i didn't like some of the sex, i wanted to say it but i just could never quite voice it! i tried once but i just ended up choking on the words in tears. actions speak louder than words and i would often just stop the sex completely but still couldn't talk it through! it was hopeless.and i have to say that our sex life was a complete disaster from start to finish!!! so talking about it is obviously the way to go and well worth it - if you can summon up the courage. these things are much easier, i guess, if everything is working but it is when they are not that it is even more important to say something.
and he wasn't even aware that i was pretty much a virgin --- i had had a 21 yr. old boyfriend, Joel, for six months before and we had done everything but the p-v (one time he kind of slipped in during a kind of heavy intimate session but pulled out straightaway - that is why i considered myself a sort-of-virgin if that makes sense at all??)
but with James, I was almost nineteen so i think he presumed i had had sex and i never actually told him otherwise. and i really loved him - we lived together for two years and i could talk to him about everything but the sex....
i think i learnt my lesson and i am much more open with my current boyfriend but luckily don't need to say too much as it just seems to work - which is such a relief... i feel that i could discuss anything i wanted to. initially i was very open with him about all my sexual dysfunctions/hang ups and problematic sexual history so he was aware of all of that - i am sure that helped.
communication is definitely worth it.