For me, I find the following:
- stroking/teasing sessions - always leave me horny, wanting more, bigger, stronger erections
- edging - want more, need more ... bigger, stronger erections
- cum after/during

teasing/edging, and I'll either remain horny, or be horny again within the hour. Sometimes the erection isn't up to par, but I've never felt anything wrong/weak/whatever with it ... it's an erection, it's just a
RAGING HARD ON .. and yes, there is a difference ... edge yourself for 1 hour, then tie your cock/balls up and do a bit more edging ... yep ... that would be the latter ...
I've had times, where I cum every day, and it just leaves me hornier ... that'll go on for about 3-5 days, then I start to calm down (ie exhaustion

)
Just to keep things in perspective, I would expect to find this more "normal" for younger guys in their 20s ... (ie recovery etc) not so much for my age range, ~40

but I'm not complaining ... (and neither is the wife hehe)