If your partner is adverse to it, would they at least give it a try once, before officially condemning it? I didn't want to have anything to do with my husbands butt, nevermind putting a dildo or strapon in it, however I told him I would try it once ...for him. All it took was once to discover that I was misinformed and maybe a little uptight myself.
We tried it and it became a staple of our sex play today.
Are there other things that you were willing to try once and discovered it was better than you expected?