Lemontree asks: I am 20 years old and have been on the pill for about 2 years now and at first me and my boyfriend (coming to our 3.5 year anniversary! yay) would always use a condom as well just to be that extra safe. But awhile back we discussed not using a condom for our first time and seeing as I was on pill (which I have never missed) knew we would be safe. We also tried researching online about when the safest time on the pill would be and I couldn't find much information...just that if you take the pill on time etc. then you should be safe all the time and other sites saying always use a condom no matter what (which me and my boyfriend disregard because we are each others firsts and only so no risk of catching anything).

Can you get Chlamydia from giving your boyfriend head then having vaginal sex? I mean I've heard that, but is it true if you use a condom after the oral?

If both the people involved in having sex have had no previous partners of any sexual nature, is it safe to presume they don't have any STDs?

Me and my partner have been together for 5 months now. I have just recently been tested positive for an STI (chlamydia). My partner and I have never used condoms because I am on the pill. My partner went and got himself tested and his results came back negative. How is that possible?

Is there anything I can do to prevent STDs after having unprotected sex?

I'm a nearly 16 year old woman who needs help...A while ago and recently, my boyfriend fingered me vaginal to anal to vaginal, but not sex. I've recently read that you can get serious vaginal infections from passing bacteria from the anus to the vagina. Am I OK to leave it be because it wasn't sex, or should I still get it checked out, just to be on the safe side?

I just got over a yeast infection, or at least I think its over. I have tried to have sex with my boyfriend twice. Well, it hasn't worked out. When he goes inside me it hurts, and so we stop and we don't go on. Is this normal? It has only been a couple days since I used the yeast infection medicine, and I thought I was clear of infection. How long will this last?

Am I right in thinking that my boyfriend and I cannot catch STIs from each other during oral sex because neither of us have ever been sexually involved with anyone else?

Also, I know that sexual intercourse under the age of 16 is illegal but is other sexual contact illegal too?