Guys, how do you last longer during sex?

My boyfriend certainly doesn't last a while during sex. And though it's not the biggest deal in the world, it would be nice. So then in that case it IS a deal to me. He comes too early. And it's always, always been this way. Now that I'm on the pill, we go without condoms and it's TOO early. We've talked about it, and though he's not thought of ways of how to prolong intercourse, I'd like to already have gathered several options so we can talk about it more than just that we both know he doesn't last long. What I have read up on this are all things he does naturally. Eats well, exercise, not on medication, is calm... I've tried changing positions in the middle of it, and he was confused. I was like "I was trying to make you last longer!" and he just said "it doesn't help!" and it's funny and I've not been harsh to him about it, but I'd like it to last longer. Has anyone tried medications? I'm not seeing harmful side effects for the first product that comes up in a link removed search for stamina. I believe it's Stamtrex, or something like that. I don't want him to have any weird side effects or life-threatening consequences. in which case, it's not worth it to me for him to suffer any of that. But I would like to know. What are some solutions? Medications? More than what I've read which he's doing already? Thanks so much.