Lord Condon said in a statement to the inquiry: "In my view hospitality can be the start of a grooming process which leads to inappropriate and unethical behaviour."
He added: "In any walk of life, hospitality can be appropriate, can be sensible, can be necessary, can be ethical.
"But on the other side of that, it can lead to inappropriate closeness, and in some cases that can lead to criminal behaviour."
More top news
Although Israel was widely believed to have been behind the airstrike on September 6, it has never before commented publicly on it.
Top temperatures of 12 Celsius (54 F).
Sarah Sanders, the White House spokeswoman, acknowledged that the attack wasn’t even mentioned in the phone call.