Lasting longer with oral sex

Well I like holding off orgasm, with head or sex, because when you do finally cum it’s much more intense. Especially if you can go up and down the sensation roller coaster a few times. I’ve cum from head after 5 minutes, and it feels good. But with my last gf it took about 25 min. before she got it right, but the up and downs of intensity made me cum so damn hard, it actually made it feel like a really good bj (which, sadly, it wasn’t).