I would say there is an overwhelming prejudice against someone being bigger or a bit thicker
when I was 18 I got very skinny due to an infection and an eating disorder, I update my pictures online regularly, my profile pic on here is from February of this year
suddenly I am getting offers left right and centre from some very cute guys, we hang out, we fuck its a fun time, my infection clears and I seek treatment for my eating disorder, I slowly put the weight back on, suddenly the meets slow down, lads I was meeting up with regularly stop returning my calls, I get blocked, some even say "You were hotter skinny" which knocks my confidence big time
I am now in a much better place, so when a very drunk gay man at a pride even asked his friend how such a fitty (my now ex) ended up with such a fatty (me) I spun on my heels and said "must be my big cock" and walked on
however I have been messaged my strangers to let me know if I want to lose the weight fast I should (insert extremely dangerous and unhealthy quick fix) even after I have said to not tell me due to my history of eating disorders
and its not just when hooking up, I went to Soho in London to treat myself to some sexier underwear, you know the type, the push up bra for the cock and balls, so I ask for advice on best style and cut for me due to the fact I have very large balls, and the last thing I need when seducing a guy is to have a ball make a break for freedom, the sales assistant looks me up and down and suggests a pair of baggy shorts, mmmm sexy, now stores in soho are promoting the fact they stock all underwear from xs to xxxl as "everyone deserves to feel sexy"
again luckily I am a confident person now and I bought the sexy pants and jocks, resisted the urge to pretty woman the sales rep "you work on commission? big mistake! HUGE!" instead I smiled sweetly thanked them so much for their help and left
don't get me wrong I know there are guys out there who like a bear, or a lad whose a bit thicker, or a lad whose got a nice round ass, but in my experience the majority are anti fatter guys, or maybe its just my experience