Yes a loyal man is beyond sexy. My Master is loyal as well as I am loyal to him even though I am available as a SP. I am available, because it is something that excites us both. It is consensual, and thus loyalty is not broken.
A relationship is what 2 people agree it to be. For some, especially as they age, menopause/manopause/life events/health could play games in relationships. And a husband/wife who has been faithful and loyal to their partner for however many years is met with it's painful, I can't/don't want to. Are they to divorce? Or are they to let that ruin their years of commitment, or remaining years to come? They still have needs, that their partner can no longer meet. If they have agreed the active partner can find relief elsewhere, SPs are literally the safest option as we aren't looking to break their relationship.
It is romantic to think a husband doesn't step out, but sometimes realistically there are needs that need to be met, for the relationship not to suffer. Same has happened in relationships where she sleeps with others to not have to sacrifice the relationship.
The loyalty is sexy, works both ways, not just for men to be loyal. But like mentioned, this isn't really the place to judge others and their relationships. We don't know what happens in their private life, and it doesn't always mean that there is a lack of loyalty by someone else in a relationship seeing an SP. For all we know, that was the restriction placed, that it would only be an SP, and not a civilian who might try to get between the relationship. For all we know their wife might even be a cuckquean, encouraging it.
