The winger was picked up by Sir Alex Ferguson in 2010 from Vitoria Guimares despite never making an appearance for the Portuguese club.
Bebe played just seven times in all competitions during four years at Old Trafford, enjoying loan spells at Besiktas, Rio Ave and Pacos de Ferreira in the process, before joining Benfica on a permanent deal in 2014.
The 25-year-old is now on loan at La Liga outfit Rayo, where he has assisted twice and scored once in his last six games, although a previous move to Cordoba saw him fail to score in 18 games.
And Bebe has now revealed that he couldn’t make sense of United’s interest to begin with, adding that he was constantly in awe of big-name stars such as Ryan Giggs.
Bebe told Spanish newspaper AS: “It all happened very quickly, it was a surprise.
“One day I was training [in Portugal] and immediately they told me to leave, that I was going to sign a five-year contract.
“I didn’t know if it was a joke. I was not there long, but I made the most of it.
“It was the dream of many kids, it seemed crazy. When I arrived there I was with the best players in the world. I found it a bit difficult; the first week I was breathing deeply. I got used to it though.
“A few months before I was watching them on the TV and soon I was running, jumping, talking with them. I watched Giggs a lot, saw how they asked him for photos, autographs, shirts.
“I arrived there without much football education, with what I had: talent, pace strength, but I was lacking many things. If a big club signed me now, it would be different.”
The Guardian reported at the time of Bebe's switch to Old Trafford that the Red Devils had paid £7.4million in order to secure his services, and whether he is involved in such a deal again over the course of his career remains to be seen.