This shit is actually pretty sad. In my area that’s always how it happens. An attractive younger girl falls for an older guy (usually 7-8 year age difference) and they ruin them.
I had a girlfriend who did it a long time ago... the first 6 months her orgasms were ecstatic, explosive, crazy strong, shaking, etc. Then it fade down back to 'normal'... for me it did not make any physical difference, but it is cool to play with during oral sex.