Is it normal that i don't get horny when i smoke crystal meth

So I consider myself someone who likes to experiment with different things in life. I mean, we're all gonna end up in the ground, so why not try a few things? So I tried pnp for the first time. It was the best sex of my life. 10/10. The other day, about a week and a half after I first tried parTying, I met up with someone else and did the same thing, but this time, I didn't get aroused at all. No erection. I'm just curious as to what it could be that is causing this to happen this time, but not the first time. I'm aware that the first time is always going to be the best high, but for it to go from full sexual promiscuity to nun in a chapel is a little bit off-putting to me.