Saw an ex boyfriend - is this normal?

[SensitiveOverthinker]

I was on the train the other morning on my way into work. I sat down and felt someone tap me on the shoulder. I turned to find my ex boyfriend from 20 years ago.
I was totally blown away. Last I knew he was living in Australia so it really took me by surprise!
We had polite chit chat about house renovations and our children. He got off the train and all I could about was the amazing sex we used to have. All these memories came flooding back to me. For context we were together between ages of 19-21 and were at different unis so we went long times without seeing each other - so when we did, well I won't go into detail...
So my point. Am I bad to think about this? Should i feel guilty? I'm very happily married and love my husband very much. We do have a good sex life (as much as possible with 2 young kids and working full time) but it's nothing like what I used to have.
I don't know why - just feel like it stirred something inside of me. It makes me want to seduce my husband but I definitely need to sort out my lady garden first.

YANBU - just the shock of seeing him
YABU -

Just curious to know what others think really

Well, if it's made you want to seduce your husband then I'd say it's simply the nostalgia of what you used to have with that guy but you're firmly in love with husband.

Enjoy your evening 😉

You're human and it's not as if you've suffered memory loss. It's not unreasonable to remember the sex between you two especially when you haven't said it made you wanna jump into bed with him again. Go seduce your husband and get your sex on

Wow, what a surprise. That would knock me sideways too. Don't feel bad, you're allowed to have memories, a past and even cheeky fantasies! Important thing is not to start yearning for him. He's a complete stranger now x

Thank you so much all! A fun night was had by both of us! 🤭

Sounds pretty normal to me. It brought back memories, is all.