Yeah one person I know for sure is like that, I do know others who have jumped from one long term relationship straight to another but in some of these instances it could be coincidence.
The guy I knew who did that was a real mess in that month or so he was single. He had been with his girlfriend for 6 years and it ended pretty horribly so it’s to be expected but it felt a bit different than other friends or indeed my own behaviour having come out of a relationship. He is normally so calm and self assured and together and he changed into this indecisive and quite dangerously impulsive person. Our friends and myself really rallied round him and tried to get him to appreciate being single for a sustained period the first time since he was about 15 but he wouldn’t listen, was on all the dating apps and getting out there every night wanting a girlfriend.
He did very quickly get a new girlfriend and went back to his old self and they’re infact married now and both incredibly happy together. So there ya go. I love being on my own, if anything I become more unsure of myself when I’m with someone and become withdrawn and insular. Perhaps that’s to do with me, perhaps that’s to do with them or a bit of both. I dunno. Maybe my next relationship will be different. Whatever happens happens.
My sister actually could be one too, she dated a boy from 14 to 20 then in a matter of weeks after that ended was dating her current boyfriend (she’s 30 now and they have a child together and are getting married next year). Again though that could be coincidence?
Ultimately I dunno how weird it is to be one way or the other when it comes to this. It feels like most would suggest having time being single as an adult and learning to appreciate your own company is a good thing but many can do this within a serious relationship too.