If it were me I wouldnt want him to know where I got the idea, may be you could start the conversation with something like
(insert your best friends name here) was telling me her lover put her over his knee and spanked her bottom (or how ever you want it) and she said it made her really hot. Can we try it?
It worked for me
(insert your best friends name here) was telling me her lover put her over his knee and spanked her bottom (or how ever you want it) and she said it made her really hot. Can we try it?
It worked for me