A LOT, and I mean A LOT of gay men, some bisexual men, and even some hetero guys want something up their ass be it fingers, a tongue, a dildo, vibrator, or for the gay and bi men a cock. My black gay uncle who is a top said how in his experience most gay men are bottoms as I had asked him why on a website we both were on decades ago, when I listed myself as top that it was odd that men who also said they are "top" would email me pics of their asses and beg me to fuck them. He told me how those men are versatile or bottoms but afraid to be honest. My white gay uncle is a total bottom and he told me crazy stories about in the 1980s meeting men at work, in college classes, on the street, in gyms, bars/discos and the next thing you know he was getting pumped full of a stranger's cum. He has had unsafe sex with at least one or probably more men who were poz, HIV+, and not on AZT or meds and somehow he was not infected. I guess he is just lucky?
I am bisexual but while technically a top/giver I have never done anal sex with a woman and if she did want it I would use a vibrator or dildo as I have a very long and very thick cock and I worry about hurting someone. I have never taken anal sex or been bottom/passiv for anal intercourse but I tried a finger, prostate vibrator, and was rimmed by a guy I very briefly dated and did not enjoy it. I was told that I don't have the pleasure areas there and to be honest I would rather just do oral sex, touching, S/M, Bondage, etc. I have fucked 1 man he was my now ex Boyfriend and he became obsessed with wanting my cock up his ass as much as possible, got super demanding, and this was one reason why our relationship ended as it made sex boring, scripted, routine, etc.