Watching "Species" towards the end where the two aliens were mating...the whole damn thing made me rock hard for some reason and probably started my lifetime love of tentacle porn. Look it up.
When I was at e3 2017 (well, watching the supercut) and saw Phil announce the Xbox One X going all the way back to Xbox with it's Backwards Compatibility program.
One time my older brother's friend did the stomach raspberry thing to me and I felt something. I was like 14 so it wasn't serious but still weird.