Porn/ masturbating

The only way I can cum while playing with myself is watching porn but I can only watch 2bi guys & 1 girl 3some porn & I find it so weird but that’s the only way I can cum from watching porn & my favorite position to see them in is for the girl to be laying down getting ate out by one guy & the 2nd guy is behind the guy eating out the girl fucking him doggy style it turns me on soooo much while using my vibrator but literally soon as I cum I be so discussed like ew why am I watching this & turn it off 😂😂😂