Excited mature wants to be fucked

I hope you're not judging me wrong, because I have a boyfriend, but the spark between us is starting to fizzle out a bit. I think that's a shame, but I don't see it rekindling anytime soon. My head is so full, and I really need some relaxation. Maybe you have a good idea for that.

I've been experiencing a wave of emotions this past week. My husband cheated on me and now he wants an open relationship. It's new to me, and I thought, who knows, maybe it's for me. This will be the first time I'll cheat. It's exciting, and I want to be taken doggy-style. I find that hot and enjoyable.

Normally, I see the future quite brightly and am quite positive, but these days I'm experiencing more and more bouts of feeling lost and fed up. My best friend said she always perked up so much from good sex and blowjobs that I should try it out. Well, I don't want to just pick up a random guy off the street and try it out, so I'm here. This is to get to know you better, and you to get to know me, so we can go on a date and I can see if my friend is right.

I'm looking for more in the realm of sex; I'd like to experiment. In my short life, I've tried just about everything there is to try, and I want more. I'm very curious about S&M, but I have absolutely no experience with it. I'm looking for a teacher who can gently introduce me to that world. Not too strict to start with.