It truly is part of their Culture in recruiting and has been for a Long Time.
A guy I used to work with had a good story about this subject---he was a good bit older than me and was in college at MSU back in the 60s, he only worked part time for us and he was a full time Baptist preacher and still is today. His buddy from High School was a good Football player and was being recruited by Ole Miss and USM. However, this guy ended up getting Drafted for Vietnam and got Married before he was sent over to Vietnam. After his tour, he came back and wanted to go to college at MSU since his Wife was at MSU. But Ole Miss still wanted him to play Football up there and the guy goes on a recruiting visit. He walks into Johnny Vaught's office and starts hearing the sales pitch of how awesome Ole Miss really is. The guy isn't really interested but is being polite and listens, at the end of the meeting the guy asks to look around campus. Vaught points out his window and says, "She will show you around and take care of you this evening", the guy looks out the window and sees a very pretty blonde girl in a mini-skirt standing there waiting for the guy. Just the way he said "taking care of you this evening" the guy knew this was a sexual arrangement. Apparently Vaught didn't know the guy was Married or maybe just didn't care---the guy had been polite up to this point but he started walking out the door and turned back and showed his wedding ring to Vaught and said, "I honored my commitment to my country (Vietnam) and I will honor my commitment to my wife, goodbye."