We dont need assumptions just a "reasonable person" test.
First a benchmark to see what you feel is reasonable:
Can you explain why you think
● it is socially acceptable
• for a male member of staff to approach a 14 year old girl (who was not looking for help from a member of staff ) and
• seek to speak to her about underwear generally and specifically about her bra size?
Once you have done that you can work your way through the logic of why this male person decided it was socially acceptable to do what he did.
Can you explain why you think that male employee thinks
● it is socially acceptable
• for a male member of staff to approach a 14 year old girl (who was not looking for help from a member of staff ) and
• seek to speak to her about underwear generally and specifically about her bra size?
Now a more complex version of how that would change if he was gay....
Can you explain why you think a homosexual male employee would think
● it is socially acceptable
• for a male member of staff to approach a 14 year old girl (who was not looking for help from a member of staff ) and
• seek to speak to her about underwear generally and specifically about her bra size?
You can even pop the question for a heterosexual woman
Can you explain why you think a heterosexual female employee would think
● it is socially acceptable
• for a female member of staff to approach a 14 year old girl (who was not looking for help from a member of staff ) and
• seek to speak to her about underwear generally and specifically about her bra size?
Or how about a police officer or a teacher or anyone you can think of.
See once a base line is established people can work on safeguarding for both the nice ones and the creep ones.