I am gay so I have used condoms my whole life but my straight friends routinely go out and have unprotected sex all the time, I'd say about 5% of my straight friends consistently use condoms.
The real solution will be when you have male birth control available as well; and then it comes down to only having sex with people you trust. I great partner is better than a bunch of lousy partners anyways.
I'm 29, and so far every woman I've fucked, I ended up deciding I didn't want to marry / have children with. But that's still on the table like it is for the vast majority of men, so vasectomy is not an option.