[they're both about as good at this as can be expected. Which is, of course, really bad. But the only way to get better is to practice, right?
It's weird. Rin has nothing to compare it to, so it seems ok to him. For such a prickly bastard, Suguro had some very soft lips. Rin's are fairly soft as well, but more than anything, he's warm. Not oppressively hot, but definitely a step above normal. The purring made for an interesting extra sensation as well. Rin doesn't bite Suguro's lip, but he does carefully scrape against it with one fang]
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It's weird. Rin has nothing to compare it to, so it seems ok to him. For such a prickly bastard, Suguro had some very soft lips. Rin's are fairly soft as well, but more than anything, he's warm. Not oppressively hot, but definitely a step above normal. The purring made for an interesting extra sensation as well. Rin doesn't bite Suguro's lip, but he does carefully scrape against it with one fang]