When we first started swinging, we encountered this question....
We answered a profile and met a couple. He was straight and she was bi..... well, until after we met and headed to their house, then the tables turned.
He shared his bi-ness with me and she chimed in that she thought it was hot.... that what is good for the goose is good for the gander.
We were both raised absolutely positively straight.... though my wife has found that she really loves women.... I've just never found ANY attraction for men.... not homophobic in sexual situations, just not turned on by guys...
But.... in order to wrap my head around this... I asked my wife if she found it erotic for me to do another guy for her.... she was pretty much repulsed.
So.... as with 99% of things in swinging... there are divergent attitudes....there are those women that get off watching husband give head..... there are those that are repulsed by the very thought. There will be some middle ground.
Bottom line? Talk... no, COMMUNICATE with your SO....YES! If he isn't terrifically repulsed, he may accommodate your passion......