Curious how you managed to get your partner/wife agree to let you punt (even just ML)

I've been punting since early 20s, now I'm in late 20s and haven't punted since I started my current relationship for a few years. Nothing is wrong with my relationship. Sex is good, but I can't help but constantly think about sex with other girls.

Starting to think if it's worth to just stay single and punt till I'm old