Yeah, hard-ons happen even to experienced men
My wife usually wears at least some see-thru dress to the beach, but this summer it was so hot she decided one day she will go fully nude. When we started walking to the beach I got an instant hard-on just by looking at her breasts bouncing up and down. I mean, I have seen them 1000x and I don't get excited usually. But the setting and the mood of just walking with my wife nude and seeing her, made me wanna do her right there. Fortunately nobody saw my dick hard and when we got to the beach everything was in order