Straight male,but loves penis?Watch
Just accept that it's part of your sexuality, you might go through periods where you are really aroused by a willy and periods where you're like 'meh'.
Sexuality and romanticism are not the same. As you are describing yourself it seems to me that maybe you could be under the bisexual umbrella (bisexual, pansexual, polysexual, etc) but still heteroromantic.
Pretty sure you can find information about those terms online.
Also remember that genitals do not equal gender! So it could also be that you just find penises attractive.
Hope to help!