Such a fun custom! Sunbathing out on my porch in my bikini, I get a bit hungry and make myself a hotdog doused in mustard (my favorite!). As I messily eat my hotdog, a bit of mustard drips onto my barely covered tits, and I giggle to myself as I like it off, and then get an idea! The tingly sensation of the mustard felt so good, so I start to squirt more onto myself, check around for any watching neighbors, and then take my bikini top off. After feeling the sensation on my nipples, I move to the shower where I continue to cover my entire body, feet, bush, and pussy in mustard, and get so turned on that I masturbate with the juices and cum multiple times! I then sit back and enjoy the sensation before showering off ;)