When men complain about a lack of sex in their LTR, others are quick to suggest "to just get your needs met elsewhere".

As a low-libido, avoidantly attached woman, I'm not jealous in the slightest and this actually sounds like a great idea. If the guy doesn't need me to meet his sexual needs, that might actually increase my desire (as does the knowledge that other women want him, too).

However, I have the impression that "just get it elsewhere" is often said out of spite and not because it's really viewed as a solution to a libido mismatch.

TL;DR: Would you be okay with your LTR gf/wife rarely being in the mood, if you're allowed to have sex with others?