I don't know if I have answered this one or not. Don't feel like looking back through the comments so I will answer anyway.
I started sucking my cousin's cock when I was 14 and continued tosuck him off all through high school. I went to a few public restrooms when I was 16 and sucked off some older guys, but that was mostly it until after I got married.
When I turned 30 I did some math and figured up that I had sucked off 17 guys. I decided I wanted to suck off 35 guys by the time I turned 35 and went on a mission. Everytime I was near a porn shop with a gloryhole I stopped by looking for cock to suck. Needless to say, I hit 35 in just a few months. On top of that, I was addicted. I wanted as much as I could get.
Over the next few years I kept a running record. On my 35th birthday I had sucked off 377 different men, all but a handful though gloryholes. I also was still sucking off my cousin regularly until he got ill a few years ago and had picked up another local feeder that I was sucking off 2 or 3 times a week.
About 6 months after my birthday I hit 400. At that point I thought it seemed silly to keep on keeping count so I quit. I am now 46 years old and still suck cock any and every chance I get. Assuming I have averaged just 25 new guys per year (a gross underestimate considering just this past December alone I sucked off 6 new guys and I wasn't even really trying) then I am up to around 650 different men. If I go with a more realistic estimate of 50 new guys per year then that puts me up around 925-950 different guys.
Toss in a blowjobs per week for my cousin over the last 25 years (600 blowjobs) and 2-3 blowjobs per week for my regular feeder over the last 10 years (1000-1500 blowjobs) and I have given somewhere between 2500 and 3000 blowjobs...and swallowed every single time