Is it just more or does sex always feel better the second time?!

Me and my bf usually have sex twice when we hangout and idk for some reason each time feels completely different, like night and day. first time i don’t feel much, but i’m always more wet? the second time i feel so much i get stiff need to clench something and i almost feel lightheaded but we have to add lubrication every so often because it gets dry? i don’t think foreplay effects it bc we usually always spend about the same time with it but does anyone else experience the same or does anyone know why this happens?