Rand, it doesn't take a large generator to run those sexual aid products...get a battery operated one!
On the serious side....I'm not an electrician but what I have learned from first hand experience (that would be failures) is that when motor operated devices are used, it takes a larger generator to start them because of the amp\voltage spike at startup. Once they are running, then it doesn't take much to keep them running, it's just that startup load that hurts you. It seems the larger the motor the more critical to go oversize to compensate. If you put an amp meter on a motor when it started it would momentarily peg the meter and that's what the generator has to overcome. Plug a grinder into a small welder and see the delay when you pull the trigger. Plug the same welder in the wall and see how fast it takes off.
One time I tried to run my well motor and borrowed a large generator. It wouldn't start the motor but would allow continuous running once started.
A welder uses a big draw when you start a weld. It has to fire off the spool feed motor, open solenoids and start an arc all at the same time. Go oversize for sure.
Look at "peak" power vs. continuous power. Some advertise "peak"
I chose the largest anticipated draw and double it. More with large motors.
Hopefully others with more info will chime in.....
YMMV...see ya at South Shore!