Try to think of something extraordinary that fits your real abilities in the sheets.

Mine probably would be absolute orgasm (self-)control while doing anal. It's sometimes not easy for me to hold back my orgasm doing PIV, especially while using a condom or after a long dry spell. But with anal sex I could go for hours with full enthusiasm without blowing my load unless I want to. And if I want to It's always there in a range of a few seconds for me to go for.