Most Helpful Girl
I guess this very much depends on the girl. But I believe most girls do not want their boyfriend or a guy they are interested in to have had too many (ex-)girlfriends as it could mean they are a player, or someone who gets easily bored with girls and move on. Most girls want some level of commitment from a guy, i.e. they won't cheat on them and move onto other girls. Unless the girl is looking for pure fun, they are unlikely to waste time on a player.
Personally, I would be a bit shocked if a guy said he had more than 7 girlfriends at the approximate age of 20, but then again, it depends on what he means by girlfriends. Whether those were serious relationships or short-term ones which are more on the just dating side.
As for a guy who never had a girlfriend at 20 or older, it very much depends on why that is so. I would never disrespect someone who hasn't or consider him a geek. There could be reasons why a guy hasn't ever had a girlfriend. Maybe due to high expectations, not ready for relationship, never met the right girl, or meeting the wrong girls. Many male friends have said how they feel depressed that they never had a girlfriend, and always, I just tell them to wait, and it happen. You may also find it surprising, that I have a few male friends in their late 20s who never had a girlfriend, yet again all due to various reasons.
Personally, I would prefer to date a guy with fewer ex-gfs than a large number of them.1THIS IS NOT RELEVANT ANYMORE