It's sad that drawing a willy is even thought of as sexual harassment by silly women like her (and Jacqui yes I looked it up and it was Lowri Turner - I have no idea what she is famous for?) - there is nothing more amusing than trying to shock someone at just the right/wrong moment. I once waited for that bit in a wedding where they ask if anyone knows an reason etc to speak now - to stick a huge safety pin into my mate's leg. Immature? Yes. Funny? you bet

I have never drawn a picture of a willy and used it to get a cheap laugh but I can't think of any reason why I wouldn't - and it would never cross my mind that I was sexually harassing someone!
It shows how far things are allowed to go. I remember a salesman who joined a company the same day I did coming into the office I was in and walking behind a secretary who was typing, looking at her screen while for no apparent reason putting his arms round from the back and giving her breasts a hearty wiggle, complete with accompanying "wayhayhay". On his first day!!! This was in the 1990s and he was given a strict talking to, no more. Today, you'd get more for drawing a willy.
I've always found a handshake is sufficient when meeting new colleagues for the first time.