I like and use dildos a lot, and you are about the same size as my husband and I still like sex with him. If it’s hard and fucking me I seem to like it, so I don’t think there is anything to worry about. Variety is the spice of life, you like more than one breast size don’t you? Try fucking her with her dildos wearing a strapon, get in on the action, best way a guy can wield a dildo in my opinion, 😉