Swimming!
I just got back from a family vacation which included spending an afternoon at my mom's cabin. I spent many summers there as a child and this was my first summer visit in many years.
It was a hot day and we decided to go swimming. I loved swimming as a child but then my teenage years came and I started feeling extremely uncomfortable with it. Being mostly naked was not fun at all! I didn't know back then that it was because I didn't feel at home in my body.
But now...now I'm comfortable in my body and so for the first time in my life, I got into swimming trunks, took off my shirt and swam. It was weird at first because my mom was there and I haven't been shirtless around her. But she was cool and I quickly relaxed. It helped that my step son and nephew were already in the water, teasing me for inching my way in (it was a little cold).
It was the first time I swam in over 15 years and it was glorious.