Eulalia - totally agree re. preversions in childhood and what you do later in life as an adult.
My ex boyfriend said he found it impossible to greet his mother with a kiss as an adult and when I asked why he said it was because he does not ever remember his mother picking him up, hugging him or kissing him as a child. He admitted that this also prevented him from being tactile with women (he would never hold my hand or hug me in public).
Ok, this isn't a preversion, but it's indication of a troubled man because he lacked the physical presence of his mother as a child.
I am not a pscho-babble sort of person, but it seems bloody obvious to me that a child needs loads of physical contact and BF is one great way to get it, I don't really care at what age.