I have an intimate question

Hello everyone, I have an intimate question. Guys, tell me what dose of of these pills to improve an erection? Not for frequent use, (I mean those who are fine), but you can try a couple of times))) otherwise you can get used to it, although there is no getting used to it. Everything is better on their own, well, or jointly) I want to surprise my girlfriend, maybe sexual intercourse will be brighter in emotions. We'll see. Thanks for answers)