Reptilian anthro guys show up with scales, snouts, tails, and usually a beefy, masculine build, ranging from lizard men to dragons and crocodile dudes. Sex scenes tend to lean into raw animal heat with lots of tail-grabbing, clawed hands on hips, and big dick-on-dick action or hard fucking. Artists often play up details like ridged skin, slit pupils, and thick, veiny cocks that look a little more beast than human.