For any hobbyist over the age of 54 an 18 Y/O provider could be your grand-daughter.
That's correct... and it can certainly be delightful IMHO...
I do find that the 'optimum' for me seems to be 22-24yo tho... the 18 and 19yo are sometimes too inexperienced, too unskilled, to 'do the dance' with a guy my age.
If I find that to be the case, I 'coach and fuck' them anyway... as they need the training.
NEVER do I fantasize that they are my daughter or grand daughter tho... maybe my neighbor's daughter...