>>130103 (OP)
>kegels
Legit, do them. They improve erections and the word on the street is that if you get good enough with them then you can train yourself to hold back ejaculation and have dry orgasms and keep on fuckin'.
>jelq/bathmate
Never do this, it damages your penis. It can make it larger, but it's not worth it, because it does so in a way that causes damage. Virtually all urologists agree on this, if you have any doubt, talk to one. Unfortunately, you're stuck with whatever size you get, it's the lottery of life.
>stamina
Kegels, edging, practice, thinking about baseball
>herbs
I've tried a bunch of herbs that affect arousal. The best, by far, is yohimbe. I would recommend that stuff- it's a mild stimulant, so don't take too much, but it makes you horny and your dick hard. You can take it orally or smoke it (very harsh and unpleasant but works) for faster onset.
Never tried it, but PT-141 a.k.a. Bremalanotide a.k.a. Melanotan allegedly causes crazy arousal in both men and women. It is administered subcutaneously (injected under the skin with a sterile syringe- NOT into bloodstream). It's a peptide that was originally formulated for tanning, so it might make you tan as a side effect, I don't know. I think they found it wasn't very effective for tanning but it makes people horny for some reason.