I saw this circuit at
https://www.facebook.com/share/p/16HFEwzkcQ/
The diodes try to charge and discharge the mosfet gate based on static electricity of user touching. Depending on the amount of charge you happen have it might not work at all, might work or could fry the mosfet (they are static sensitive components).
FETs are extremely vulnerable to ESD. The datasheet can provide proof of that. When static electricity is applied to the gate, the gate oxide may be destroyed.
A typical way to protect a MOSFET is to inserting an ESD protection diode between the gate and source terminals. This circuit is lacking those protections, so I expect that it is not very reliable.
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