Yes, swallowing one's own come, or licking one's own pussy love-juices, is-almost-futile, unless you are extremely narcissistic, and that may be. Whatever...
Yes, baby...:) A complex matter it is--that of eating one's own. It delves very deep into Freud's cannibalistic studies, and all the taboos associated with that.
One can't "Eat oneself" and survive, but one may allow another to eat of-the-self...and therefore--carry-on....
Consider this:---
A man: A woman--trapped in an underground cave...
An abundance of air-stale but sufficient- Water--plentiful, but brackish: They were close to the coast before they went in there; and, it is relatively warm now--down there in the cave, where they were, where they got trapped.
Food---non-existent: Except for mold, and the occasional lichen.
Chapter 2.
Before their cell phone battery dies, the rescue party informs the couple, that help is on the way, but with the best digging equipment available, it will be at least 45 days before they can dig them out. The human body can survive 45 days without food, but barely...
There was nothing to do but to wait there in the darkness of the cave.
They hugged, and kept each other company 24 hours a day, but due to the intense anxiety of the situation, the husband took to fucking his wife, four, five sometimes six, or seven, times a day. There was nothing else to do so, he fucked her pussy doggy and missionary style along with her ass-hole day in day out; but, he always had a liking; in their rather-chased-marriage-to come in her mouth.
She, ever since her step-daddy made her blow him every day, following her 18th birthday, when her mom was down at the supermarket shopping for food; coerced into swallowing his load, by the threat that if she didn't:
Do as he demanded.
He would leave them--her and her muv, and cut off all subsistence to them. So she swallowed him--every fucking day! ...in the very protection of her--and her mom; as an after-thought, of course.
After years of that! ...Oral sex was strictly "off-the-menu", baby, in her marriage.