Okai, this is kinda akward, but here goes.

I have had sex with multiple girls, and had sex 10 times in a night and made the girl have orgasms as hell. But now, with the two last girls, ( one night stands, one night with alcohol, one without) I got erection as we were having foreplay, but lost it after I started to penetrate her.
And one night we were naked in the bed, and doing stuff, I didnt get hard.

This is performance anxiety, do anyone have som tips to get over this? With my last "girlfriend" over 3-4months, I did not have this problem, and had amazing sex.

Help me please

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engañador

Don't worry about it, i had it a few times in my life, especially when i first started having sex, remember its all in your head, you have done it plenty of times before, and there is noting wrong with you.
Is there any small physical problems or something that is making you not get hard.
Just relax

Relaxation is key , tell yourself whats the worse that can happen and if that dont work get her to go down on you until you get hard and if that dont work then you might be gay lol jk

I've had problems similar to this, it's likely psychological. Perhaps your mind is used to having "relationship sex" and it gets confused or anxious with these one night stands.

Maybe you're not that comfortable with the girls?