Mirena
"I have had Mirena since December. Initially there was some discomfort for the first week or so but since then I haven't noticed it once. My boyfriend has felt the string a couple times but nothing major. 95% of the time we have sex he doesn't notice it and neither do I. What I like best about it, besides not having to take the pill everyday, is that I only have my period every other month if that. I definitely would recommend it if you hate taking the pill and aren't thinking about having kids anytime soon. Luckily my Mirena was free through the local health center. Definitely worth it!"