WARNING ⚠️ too much text.

Hey all, just to give a bit of context. I'm a 28, Latino guy living in Toronto. I've been married to a girl for more than 8 years. We are very open-minded. Both of us think that it is more "natural" to be bisexual than straight because we are just humans who like other humans, but for social pressure, many of us just consider it strictly straight, bi, gay or any other category. Both of us consider that we are bisexual, but we have never been with someone of the same sex, but we're open to that. Anyway, that is not the point.

A month and a half ago, I started to feel curious to be with other men and try to be top (I like to be dominant, and I like butts, I think it's an obsession lol) all of this without telling her. A week ago, I finally had the courage to concrete an encounter with someone that I know in Grindr. Ngl I like to be sucked and have sex with another man. The thing is that I found that it is so much easier to have sex with bi or gay people.  

I found many guys here on Reddit and Grindr and also a website call Sniffies who were down for it just to share some pictures and messages. But also, that is something that worries me a little, because many people are open to group sex, like cum and dump and similar practices that I'm discovering now and I'm considering not safe.

What worries me about it is the danger of getting any STIs and passing them on to my wife. I want to continue exploring that side, but I also have many questions and dilemmas, so my questions are:

1. How can I tell her about this in a smooth way? I know she is very open-minded, and maybe her worry would be the same about STIs. I don't think that she would judge me for exploring. But I'm still unsure of how to approach this.

2. How can I mitigate the danger of having sex with different people? Even when I already use condoms for everything.

3. Should I find a FWB to try all the new things or better if I take some safe measures and try with different people?

4. From your experience, what do you recommend for me to navigate all this?

Just to add: I'm just looking for sex with other men to fulfill my curiosity and just for pleasure, not into something romantic or similar and think I will keep it like that.

Feel free to comment on it i more than open to any feedback or comment, also maybe I'm overthinking all lol.

Thanks for taking the time to read. 

Edit: My wife and I have already agreed to have an open relationship and its rules. My question is that I am assuming that it applies to heterosexual relationships for both of us and well this is not the case. To be clear that is just my assumption.