Sexual connotations

Sexual connotation, is it just play on words humour or immature sex obsessed thoughts? Do we even care if laughing makes us feel so good anyway?
I personally can't help but laugh when it's harmless fun and not personal or derogatory, what about you?
Phil and Fern on the This Morning show in England are a classic example, especially as their fits of giggles are so contagious. They obviously share the exact same humour. They make me cry laughing.
Here's a couple of examples..

You don’t mind dunking a bit of beef do you?


Muffins and ginger nuts? Oh dear. (Phil -the chef, is Ferns husband)