Not all therapists understand nonmonogamy, if op costs to do this route they should look for a therapist with experience with nonmonogamous couples. I've had an open marriage for a long time.

Married 20+, open about a decade

Sexual incompatibly is one of the most generous reasons a spouse can offer to open a marriage. She loves you enough to want you to have hot she doesn't give you. Understand how selfless that is of her. My advice is to take it slow, give your wife time to make sure she's ok with this. Talk to each other about it as much as possible and before you progress to me levels.

>how does a married man even find partners who would be okay with this dynamic?

You make a profile on OkCupid, it allows you to state you are married and nonmonogamous. If you don't know how to make a dating profile read up on it, there are a few subs here that will give feedback on your profile. Be prepared to take some time to find someone. My gf has success on FB dating as does her husband but I've never used it so I can't tell you firsthand.

No one person can fulfill all of someone else's needs, let alone wants, and think how much pressure that is to put on a person. Ethical nonmonogamy fixes that. Here's a non sexual example. My gf's husband is getting them dance lessons for her birthday. I was happy because I hate to dance.