Am i not attractive enough for my fiancee?

i have been with my fiancee for over a year we have sex around 9 times a week and everyday i find him either in the shower or on the bed masturbating not watching porn or nothing he just does it all the time we have a lot of oral sex to 5 times a week i have even seen him masturbate 3 times in a day after we had sex 2 times am i not doing it for him or is something wrong with him????