i have the same problem, sometimes and i feel soo bad, unatractive and boring.
i don't know if is my, i think in sex all the time and when i see my husband i feel so horny(sorry for the word) i love im so much.
and another thing its that when we have sexual relations, in one day he ejaculates once and has a very strong erection and does not happen again in the whole day, but when he sees porn it has an equal erection of fortress (even if we already had sex) and he ejaculates .... that again makes me feel very badly, I don't know what to do or think, as I said that earlier I feel slightly attractive, I am 19 years old, my husband 23, one baby of 3 months, i dont know if it is me or whay that it is appening if you want add me to your msn that my e-mail is gothic_girl1984@msn.com