Why wouldn't a guy want to taste his own cum?
If he expects his partner to suck his dick and hopefully swallow, what is there to be afraid of?
What's this BULLSHIT "EWWW" factor? If a guy wants his partner to swallow, why the "EWWW" factor???? If a partner can swallow, why can't the producer swallow it too, as in licking pussy, and whatever dribbles out of it?
I, for one, absolutely LOVE to eat pussy, and will GLADLY swallow any fluids that flow out of it, including pussy juices, AND, my own cum!
I actually get off watching my woman lick by cock and balls after I pull out of her after a hot fuck session, knowing she is licking up her own juices as well as leftover cum running down my shaft and balls. Likewise, I will do the same with her, mainly because - who doesn't like a tongue licking their genitalia immediately after cumming???
Look, the body fluids men and women produce during sex...AREN'T POISONOUS!!!
Learn to enjoy the scents and flavors of yourself and your lover. It can be a pleasant memory that allows you to look forward to your next session together.
Hell, just thinking of those tastes and scents makes me hard, it makes the anticipation that next encounter SO much more erotic!