From a man's perspective...we are extremely primitive creatures who usually base everything on looks, boobs, legs etc...I admit to that my self and I have learnt that you need to look a whole lot deeper to truly fall in love, respect and be happy with someone.
My ex was i suppose 'Attractive' as you describe, trust me that when people use the old cliche 'beauty is only skin deep' it usually is. Beneath all the zhuzz there was a self obsessed, attention seeking, manipulative, cheating liar.
Your man is probably with you because maybe you respect him as he respects you, he likes being with you for who you are and he, like me has seen what it takes to be happy...and that isn't having a 'Trophy wife'
Be happy!