How to not be repetitive in erp?

When I do erp with a partner I usually describe actions well but my main problem is that I seem to think to write repetitive stuff and then going to another idea, usually during mid rp the script is already on sex and my mind goes blank on that moment, should I write *I keep thrusting* or do something else? I then bring the action above by kissing but I would like to know if there is a better way to write about a person thrusting into someone repetitively.