Sex is a two-way business. You're interested in what you can get from him but you don't seem to be interested in what you can give to him. If you want sex, you've got to be proactive and provocative. You have breasts. You have genitals. Use them to excite his interest. That's what they're for. If you don't, then you can only expect him to look at what's available elsewhere. A guy who's kept fully occupied with your breasts and your genitals won't have the energy to look elsewhere. But if he's not certain about you being receptive he is most certainly likely to look elsewhere.
There are plenty of guys who are very satisfied indeed with wives who have bodies that are far from what is usually considered the female ideal. Satisfied, for example, with flat-chested women who use their nipples as other women use their breasts. Satisfied even with women who have beard growth like men and have to shave every day. Satisfied even in some instances with women who have a penile urethra. What those women have is not very much in terms of a female body -- but they know how to use their bodies in a way that men will respond to and they give it everything they've got.