The guys making fun of other guys for being virgins are just jerks that enjoy hurting others. I don't think it has anything to do with them trying to improve their image. They just think they can get away with it, and find the pain and humiliation of others funny. Almost no one thinks these guys are cool.
being "cool" or "alpha" are terms a 13 year old guy would use to underline his significance or some sadly retarded grown up maybe... normal grown up people don´t use those terms and also don´t agree with what people who use them say.
No because that's being a bully. I don't like bullies and on something like this that's even worse. I lost my virgity when I was 26 and I haven't been with anyone for 13 years and now I'm 41 (so judge if you want). Most guys who brag a lot on this or any site are not getting any either. So don't hid behind the keyboard and make fun of people period.